^ I actually think much of Forever is pretty good and he at least got Batman to move and fight like, er Batman. I remember Schumacher - who seems like a nice guy, it must be said - saying that while he loved Burton's look for the first two, he wanted to do his own look for these movies, hence the day glo, garish colours etc.
The problem with B&R was much like that suffered by Star Trek V:TFF. The studio saw that a light-hearted movie - ST:IV: TVH / Forever was a big success and insisted on going even more light-hearted with the next one. And, of course, they went far too far in that direction. Much of my hatred from that movie is aimed at Akiva Goldsman's godawful script, rather than Schumacher's direction.
And as you say, Schumacher has the decency to stand up and take responsibility for B&R, even though it would have been easy - and probably correct - to blame the studio.