Leave Buster Proposal

Nope. Nope. Nope. Nope. NOPE.

It is not your decision to be telling people when they can or can't quit games. If they're in a duo, and their friend crashes out, do you expect their friend to just sit there and wait from the very start of a match, or just back-out and retry a match again?

People need to stop complaining about leavers, "abuse" (that isn't even abuse), and other completely unnecessary, whiny, and pointless things that have no impact whatsoever on a game, beyond making it worse.

If you don't believe me, let's take a look at Overwatch.
The first thing Blizzard implemented was penalising leavers because players complained that a leaver meant they can't win the game anymore; which resulted in players that were extremely frustrated with dealing with others, couldn't leave. They had to remain in the game and deal with their frustration outright. This created far more toxicity in the game.
Next, a report system was implemented to deal with the toxicity, to combat "racial, sexist, homophobic, bullying etc"... because those players that complained about leavers, are now the ones complaining that those same leavers that can't leave are hurting their feelings... none of the actual reasons behind the report system have ever been effectively fought (I regularly stream Overwatch, and pretty much every single one of my streams has someone being racist, homophobic, xenophobic, sexist, or just an all-round general waste of oxygen), and players now just use the "Abusive chat" as a weapon against someone who disagrees with their opinion.

Since the report system is continually abused (and still is because Blizzard have an automated system they couldn't care less about monitoring...), people now no longer use voice comms, or text comms at all to communicate in a team game, because if they do, they're either going to be "called bad" which apparently hurts their feelings, or they're going to be reported or telling someone to "shut up".

So lets recap;
Blizzard implemented a system that prevents leaving, and created toxicity.
Blizzard implemented a system that combats toxicity, but in turn that system was abused more than the gamers actually were abusive.

Blizzard implemented an automatic report handling scenario to combat the amount of reports received, and players are either banned unjustly, or don't communicate or work as a team at all now.

Is this really what you want in this game too, or are you just going to let someone quit since it literally has no bearing on the outcome of the game whatsoever since you have no skill rating, no competitive ladder, literally nothing is impacted by you winning or losing a game?