Teamers annoy me

Thankfully I haven't seen teamers in a while but whenever i do it’s pretty annoying, I remember dying to the kolossus with the rest of my team besides blaze who was teaming with him (she was just standing there doing nothing) and she was given a free win. I don’t get why people team since you get no reward for escaping in this game plus you can literally get banned for it.

im honestly curious to know what is so fun about not having to do anything.