I don't want to keep reporting players, but Strzebo is an infamous troll and teamkiller.
He often pretends to be friendly then stabs you out of nowhere. People have noticed that he joins SM just to troll and get votekicked.
I've been trying to ignore his weirdness thinking it's funny and only temporary. Well it's been happening for months now and it's getting annoying.
This video compilation shows all the things he did just last night:
https://streamable.com/iwrb22
His steam profile:
https://steamcommunity.com/profiles/76561198884741948