Even sold/ repacled my MacBook Air with/for it :D

What power supply do you have? More than 30 watts?

Feels like the motherboard sees power but it’s not more than the laptop users to be aktiv. I have that kin of behaviour when I try to charge with a 20w charger.

Try charging it while it’s powered off. Than it doesentbuse any power but can charge.

Try without the expansion cards on every slot.

Maybe it’s redundant but did you deleted the driver one absolutely? (Before reinstalling?)

There is a tool to delete all Grafiks drivers.

I like this idea, I just want to add the idea of maybe buying an m2/m2pro/… machine. Depending on your workload etc it can be much more affordable and is more environmentally friendly from my perspective.