Every game mode is unplayable shit for high level players right now
Play some ranked games? Every single one is 50% players trying their hardest to win and 50% players trying out new champions and roles, and often going 0-10-0, resulting in every game essentially being over within the first 5 minutes, because this shit doesn't fly at Diamond.
Play some normal games? Matchmaking is a complete clusterfuck and we may as well be flipping coins, because it creates completely one sided teams (i.e. 5 random Gold/Silver players vs. 5-man Diamond premades).
This is pretty unacceptable. Either ranked shouldn't affect MMR during the pre-season, or normal matchmaking should be acknowledged for the abortion it is and fixed.