riot are doing all they can to improve the game.
their matchmaking is as fair as it can be, they can't see into the future.
most of the time, the bans are fair and justified.
the art department (this is obvious) is doing amazing right now.
the bug team is doing all they can (to an extent). a lot of people think that there is a magical 'fix all bugs' button, when in reality, most of the bugs are very hard to fix
in fact, the only part of riot that is doing terrible right now is the balance team, because lets be honest, balance right now is pretty shit.