That is sad and part of the problem.
The other part is that some do play 50h, some 200h, some 500h, but still vast majority of them quit. Why?
Probably a lot of reasons. One thing is sure: bugs, crashes, no proper rank system, repetitive character selection play big part of that.
No amount of advertisement, good reviews, or money splashed in any direction will change the fact that game-play needs to be top notch in the 2016 gaming market, no bugs, only occasional crashes, working ranking systems, skins/hats whatever colored pixels people need now days.
and I so hope for that
PS. not comparing or anything, but Overwatch showed how its done. I got no issues, annoying things, crasches, bugs, unfair characters. I do have superb performance, variety of free characters, intuitive mechanics… well, no really ranking system. Leveling up by time played is useless after 200h - 300h, some ppl reach high level, some will never reach it.