A guy leave the team... 4-5 is always hard to win, specially in games like this. The game leaves you with 1 less without give you a replacement player or at least a bot. And no, is not funny.
Then... if my experience is bad, I will leave the match, but at the same time if i leave will punished for leave the match... so is an infinite loop. And all i can do is wait, waste my time and play an unfunny match (almost impossible to win) and get a terrible experience.