Bloody Windows kept waking up after a few seconds of being suspended. Someone here mentioned it could be the mouse, so I disabled its function to wake the pc . And you know what? That piece of trash windows still kept waking up for no reason. Makes me angry.

So I found this magic command 'powercfg/lastwake', which shows the reason for the last wake. And look at that! The fucking realtek network shitcard is allowed to wake windows.

Why would windows enable that on its own? Why? Because I for sure did not make this change and suspend was working for me until a few months ago (yes, these kind of problems take me very long to fix, even though it would tske only two minutes).