WHY DOES EVERYONE KEEP LEAVING TEAMBUILDER DURING CHAMP SELECT

I'm a support main and I leave if I don't fit the team comp well.

Because since I queued as support my queue is instant pop. Thus, I can leave and instantly get a new team if I don't like one team's picks.

oh

That's true.

For example, if I pick an assassin as jungler and I am the last person to enter the lobby.

The rest of the team composition is: assassin mid-lane and top-lane, ap mage support, adc. I will do more harm than good to this team with my assassin. Better find another team. ^^

P.S.: Sorry about mistakes in english.

Probably because they don't like the champions that other people selected.

If it is a bs comp I throw up the deuces and peace out

Because that's what you're suppose to do in Team Builder. It's also what makes finding a support so hard.

A good support picks their champion based on what their ADC and their team needs. Team Builder doesn't allow for that, mandating that the champion be picked ahead of time. This means that if a good support wants to play their best in Team Builder, they're encouraged by the system to bounce lobby to lobby until they find a team comp that they synergize with. Since this is more hassle than it's worth, you find far more support mains in the other queues.

Honestly, Team Builder isn't worth the time of day for anyone who's not an instalocker.