

I agree with your sentiment regarding confusing syntax, however I think that confusion simply requires a calculated approach to dispell it.
It’s a prime example of why I use scripts as reminders as much as I use them functionally. I work out the syntax once… save it to an example script, then save myself 20 minutes of remembering by just $ cat ./path/to/script.sh and copying said syntax.
So if you can change your workflow such that learned things stay around as examples, I feel that you will pick it up much more quickly :)
KDE Manjaro running on 4 or 5 of my machines, pure stability. It sounds like a hardware issue.
Here are my suggestions to diagnose this.
Option 1. Setup an ssh server, connect from a second computer (or phone via Termux), execute $journalctl -fe, and observe the journal from your second device when the crash occurs. That should help pinpoint the issue.
Option 2. If you don’t have a second device, use a non-gui tty, access via Ctrl+Alt+F1. (Usually terminals are available F1 thru F6). Once again execute $journalctl -fe and observe it during the crash.
Tbh option 2 may just be easier especially if you have minimal knowledge of ssh. Good luck, ping me back if you find this helpful and would like more perspective, and apologies if this doesn’t help you.
If the entire computer crashes, boot into a terminal and browse journalctl history of previous boots, sorry I don’t have these commands off the top of my head but if you need them and ask I will get them for you.