The vast majority of players in your playtest is still a much smaller number than what you think is a vocal minority, you've received so much love for what you put out yet there is one resounding criticism and that is that the team levels suck, ruin the flow and being disqualified for something ENTIRELY out of your own control is not fun or fair in any way
I enjoy this game and I want it to succeed and have a good life but there's been other game devs who dismissed criticism as a ''vocal minority'' and only started caring after the playercount dropped far below a healthy number, aka when its too late
The only way you could make team levels enjoyable for your playerbase(not your playtesters, your playerbase) is to make sure its only ever two teams going at it with an even amount of players, pretty much all of the current 3-4 team levels can be refitted for that purpose and suddenly there's a lot more balance and as a result a lot more enjoyment, at the bare minimum atleast make them far less common than they are now
There is no fun in ''struggle to work together'' because of how the 3 team levels work, two teams get an advantage early on and then bully the already losing team, struggle as much as you want, you're not making that comeback and oh, you're eliminated
But oh well, just queue up for another run right? Games fill quick anyway, oh, its back-to-back team modes, yay
Speaking of quitting, I don't think looking at quit rates is what you should be doing when looking at what to tweak, nobody quits because then they lose out on their earned rewards(and if thats not the case then atleast thats what they think happens, still prevents them from quitting), they just give up and stand around and in the worst case scenario give up and start actively griefing by grabbing teammates/people who are still trying to win
Please pioritize that playlist that you really like the idea of, its desperately needed and could make a huge difference in player retention