I'm sure I read a more recent account of a satellite moving another satellite around in order to degrade its orbit, but I can only find this 2022 instance: https://www.twz.com/44054/a-chinese-satellite-just-grappled-...
Now this is going to have to be a rabbit hole for me (and some AI) this weekend.
I haven't looked at stats lately but I'd guess the #1 source of debris in space right now is still the Chinese ASAT test which threw a bunch of crap into Medium Earth Orbit. Before that, the main source of debris was leaking coolant from some nuclear reactors the Soviet sent up