Low FPS isn't the worst. I've played games on plenty of potatoes. Nothing is better than a buttery smooth FPS, but it's not the end of the world.
A bad team mate happens but it's just the way it is sometimes. Dude could be new to the game. Unless they are straight up throwing I can get over it.
Usually after the first few times, my mom would usually get the picture. It's a little annoying but it's usually pretty brief (unless I was in trouble)
But connection issues? You can fuck right off with that. I can't tell you how many times my Internet just turns off in the middle of a game for no reason besides fuck you. And Internet lag is the fucking worst because, unlike the other options, you literally can't do anything about it. Everything else you at least have some control over. Bad FPS? Lower the settings. Bad teammate? Try your best to carry and make up the difference. Mom calling you? Just don't be rude and say it'll take a minute. Bad Internet? Your ISP is like "lmao fuck you it's just shitty today. Too bad we're the only option in town." I've had some ISPs that will just turn off my Internet for a few days for no reason and I have to call a technician to get it turned back on. They're always like "oh man it was turned off for some reason I don't know what happened."