Man, that sucks! I know I had read about screen issues on the 3 and to expect them on the 4, but none here. Sorry you both had issues! One day they'll be perfect. I hope.
Honestly, that should be pretty easy. Throw a thermometer that can connect to HA, put it like on the backsplash or somewhere nearby. Figure out the average temp near there and what it's like when you're cooking, then HA should be able to make it pretty easy to check and keep the previous temp(s).
No clue how to do it with an ESP but temp tracking is real common in HA and the automation setup should make that pretty simple to alarm on.
Might have to fiddle with it, but then dropped the command into a new chat and had it explain what it does, and it figured out that it should use nop when Firefox is focused.
So, hope it helps some. Now I'll go think about getting back to i3 somehow.
There's just not really anything else quite like Noita, is there. What a great game.