You've missed a small handful of stuff, most of which you can't go back for, no. Flavour text, one or two items, some scenes get additional text or images if you're corrupt enough, one particular scene only unlocks if you're corrupt enough...
But that's OK! Keep playing through the game the way that comes instinctively to you! And when you finish, you can start a new game and maybe try and interact with and get involved with more corruption stuff. It might be fun to try a different playstyle and see what ya missed? That's sort of the point of an RPG, no? :)