I agree - I don't think there is an excuse for him being a douche. He's also probably the smallest part of TOOL at this point (I'll probably get push back for this but w/e).
TOOL is primarily a project between Danny, Adam and Justin. They write all the music, and Maynard comes in at the last moment and records vocals over top of the finished music. Adam does all the artwork, etc. Maynard is off doing APC, Puscifer, his wine and restaurants, etc. He is a very busy, prolific guy and only spends the minimum required time with TOOL at this point. He has a nice voice and I dig his lyricism.
I have pretty much resigned myself to killing my idols, and I'm not a 16 year old Maynard fanboi anymore thank God. I can enjoy the art while separating what a purported jerk Maynard is rumored to be.