I don't know about the missing/broken apps. Possibly this is due to using the IoT version. Is there a reason you're not just using the standard version given that you're on supported hardware?
Windows first changed to the context menu showing PowerShell (Admin) instead of Command Prompt (Admin) by default (but you could change it back), and then when Terminal came out the default became Terminal (Admin). Terminal is not in and of itself the "command line processor" that is being run when click it. Terminal is a console within which either PowerShell or Command Prompt can run. By default it's PowerShell on startup but you can change it to Command Prompt in the settings within Terminal, or just open a new Command Prompt tab. (God I hate tabs and I dread the day they decide they don't need to provide an option to turn them off in basic utilities like this.)
Win-X is not the Start menu by the way, it's the context menu for the Start menu, the "power user menu", or Quick Link menu as Microsoft calls it.
Where is this shown? Without knowing where you got that output I don't know why it would show only two. I can't find any pages that refer to TRIM = 0.
The Samsung MZVKV512HADH isn't found in any search. They seem to have used "MZVKV512" for multiple models, like the 950, 951 and 961 so those last few characters are important. Does it look like an OEM drive or retail? Is there anything like PM950 or the like on the label? It MIGHT be an SM951, or a version of the 950 Pro. Either way, anything from that time period has pretty low performance. Their max rated speeds are just barely over 2GBps, PCIe2x4 even though they're Gen3. Even if performing perfectly I wouldn't be surprised to see a noticeable difference between this drive and a Gen4 drive, though 20x is still far larger a difference than should be expected. The IOPS are also not particularly high for that drive, which would have a bigger effect on the performance than the throughput, and THAT could be the issue. The Crucial P3 has no listed rating for IOPS, so I would bet that it's particularly low as well. (The 2TB isn't terrible but not great, and the 1TB would be lower.)
Notice in DiskInfo that both your Gen3 drives are running at x2, only lanes instead of 4. You're automatically being limited to 2GBps even with the faster P3 model. So the question is why that's happening. You say you're testing with all 3 drives in the second slot of the board, M2_2, right? The reason I asked about the lanes was this from the specs of the board:
I wondered if you had anything plugged into the USB 40Gbps port, but that would affect both the SN850x and the other two drives if they all connected in M2_2. You are referring to the slot that is immediately under the top PCI slot, right?
So the root of the problem seems to be that your Gen3 drives aren't running at their full speed, although their low IOPS capability also may be contributing. The WD drive is getting 4.5 times the sequential throughput, and 1.5 the random performance, and higher IOPS than the other drives even if they were running at peak. It has 4 times the read IOPS and more than 9 times the write IOPS of the Samsung, and probably double the P3's. The only indication I can find for this board that would make a slot run at x2 is the note above. Every other slot will run at x4 all the time. Physical damage on those old drives could explain it.
Try plugging them into the other two slots. There's no particular reason not to use them in those since there's plenty of bandwidth upstream. Then see if DiskInfo shows them running at x2 or x4.
Thank you for so much help, and for explaining how it works too. The reason why I changed to W11 IoT from normal W11, was the game X4 dropped FPS and became unplayable, whereas it was fine on W10 and now ok on W11 IoT.
Trime = 0 comes from putting "fsutil behavior query DisableDeleteNotify" in PowerShell.
Like in the link, and 0 means it's working. I'm not using any USB C, or USB 4, I'm only using 1 USB 2 for the keyboard/mouse, and yes that Samsung MZVKV512HADH I got used, I think it came out of an old laptop, back when I couldn't afford to buy a new MVMe drive.
Well, I have good news It's now much much better, but I don't know what exactly fixed it...
First in the bios all the M.2's were set to gen-5, so I set them to auto, ASPM-PCIe was on L1, I set it to auto, PCI_E1 Gen Switch was on Gen 5, now set to auto, USB4/M.2 Switch is back to auto from M.2_2-x2 (could this be part of it?)
I think one of the things like "Game Boost, or NPU AI Boost" may have changed everything to Gen 5, as they were on.
But then I opened MSI Center and found many drivers out of date and the PCIe-M.2 drivers and 3 NVM express drivers were missing! I can't believe I never checked them, as it installed them automatically when Windows first booted,
Then Windows update asked If I wanted it to check for drivers which I clicked yes and it found 4 more,
Now both gen 3 drives are running at x4!! , and faster in CrystalDisk, where the MZVK is now R 2510 W 1500 in Q8T1, But the CT1000P3 is about the same.
And the main thing is when starting TLoU on the NZVK drive (only one I've tested) it's about the same as 4th gen drive, maybe 1-2 seconds slower at most.
So I don't know for sure what fixed it, but I will be going back into the bios and changing them one at a time, and I don't understand why the bios was setup like it was, as I never changed anything apart from the memory to XBOW and to the correct ram stick voltage as it never changed when turning on XBOW, and the PC wouldn't start without setting it to 1.35v.
I still have a missing driver showing in Device Manager, saying "unknown device" but I can't find what it is, I may find one of them driver scanner programs, just to see if it finds one... But for now, I keep testing, and thanks again for sticking with me
https://www.thewindowsclub.com/enable-trim-in-windows-10