I've tried looking at a few Helldivers 2 collab streams lately, but I seem to always stumble into the ones where the only thing they're doing is repeatedly team-killing each other on purpose, and personally I don't find that very entertaining.
Sure, accidental team killing is part of the game, and can be very funny, but when you keep doing it on purpose... maybe some people are entertained by that, but I'm not one of them.
Though I feel like I should note that if you're playing the game, it is not worth getting angry at your teammates if they happen to kill you on accident. That is part of the game, like it or not. If it causes you to rage, then this might not be the game for you.
Nothing goes to plan in this game, and if you're looking for perfect play, then you're definitely in the wrong game.
There is also a discussion to be had that being obsessed with the "meta", and focusing on grinding levels and medals rather than contributing is maybe not the right attitude to bring into this game, but I'm not sure if I want to get into it.