The current iteration of competitive is frustrating, but the 2 main issues have been talked about by the dev and they are working on resolutions.
If you're wondering, the 2 biggest issues is leavers in competitive. If someone leaves, it's harder to win 5v6 than most other games. That isn't the issue though - everyone gets punished if someone leaves. The winning team (team with no quitters, or even the team that manages to pull off a crazy 5v6 win) is penalized by getting much, much lower ranking points. Normally you go up or down by 50-75% of a rank, but if someone leaves then you only gain 10% of a rank if you win. Blizzard have already mentioned the other day they're working on the leaver problem.
The other issue is coin flip in the case of a draw. A coin is flipped to decide who gets to attack or defend in the final round. If you cap the first point, the attackers win. If you defend the first point, defenders win. The problem with this is the vast majority of maps heavily favour attackers for the first point. So if you roll the defense flip, you basically lose by RNG after a long hard fought tie. Blizzard have already said they're scrapping coin flip sudden death in season 2, but I imagine it will happen sooner with all the complaints.