There's nothing wrong with the pre-season.
There's an extremely high chance that if you are complaining, your complaint isn't "This change is broken/bad/whatever" but rather your complaint is actually "This thing is different from what it used to be and I don't like it when things change".
Have you never looked at a single champion release in the history of the game? Basic 101 is that it's going to take weeks (and probably months with this scale) before you even really have a clue what's going on with all these changes. **Things aren't broken just because you haven't learned to deal with it yet. **In the meantime "Things are different" is about the entirety of a complaint you can make.