The veracity of each report is subjective. You can't honestly expect every player you report to be banned, as their behaviour in one game is not necessarily reflective of them as a whole. I've been playing since beta on ps4, and bar the odd foray into X-Com 2 or select other games this is pretty much what I play, and during that period I have seen some utter garbage players fail in the most spectacular of fashions. But the standard has steadily improved, of that I have no doubt, yet I still watch with complete bemusement as teammates dive 1 v 5 as HouYi and expect to win, only to give out some vgs abuse because of course its everyone elses fault they died.
Fact is ranked does suck, for a plethora of reasons, one of which is matchmaking, one is idiots who can barely spell 'internet', but the main reason is the try hard fuck you I'm pro mentality that seems to permeate so many of the players there. If people really want ranked to improve then the best thing they can do is help their team through advice and help, not condescension and derision. One improves the experience for many, the other makes some person feel better about themselves.