Ranked Issues - Team balance and Quitting

Early Quitting - I kinda just crawled out from my ranked rock for tactical and I'm very confused as to why people keep quitting towards end of the round. I either loose points or get 0. What's the big deal behind this??

Team Balance - Is there balance issues still in ranked? I thought this got patched last season? Im bewildered that I keep getting plat teammates and the enemy team is all mid diamond on comms...

Tagged as need help because I have no idea what's happening. Appreciate you all.