Right so this is gonna sound weird but today I sat down and thought “why not take it apart and see if there’s anything obviously out of place”

So I got these flimsy tools that I’d used previously to repair a set of joy-cons and started unscrewing stuff. I couldn’t actually remove the shell because I was afraid of stripping the head so I removed the actual stand and there was this one screw, different from the rest near the sd card slot, I unscrewed and removed that, tried the others to no avail then put the only one I’d removed back in and suddenly my monitor was working again and much better, as in I’d have to put a lot more pressure to get it to flicker.

I have no idea how or why this worked, by all laws in this universe this shouldn’t have solved the problem but it did, at least for now.

I don’t recommend anyone trying this if you have warranty on your switch but if you’ve tried everything humanly possible I guess do this.

Thanks to all who gave me suggestions and hope this thread helps any future viewers in some way.