Just sat in a 6v10 match for 15 minutes. Not a single person joined our team as we got destroyed by P2W douches.

Greetings Cowie102,

I'm sorry to hear about the sad end for that particular match; we are aware of an issue that sometimes keeps the matchmaker from replacing leaving players during the matches and are hoping to fix this as soon as possible, likely with the next patch.

Meanwhile, there's no direct workaround for the issue, but of course, as always during a match, if you are feeling frustrated more than anything, it may be better to leave, take a break and come back later with a fresh feeling.