The first Transformers was good IMO, the next two I think were alright and I didn't watch the latest one. I heard TMNT was bad but the second one has Stephen Amell and Sheamus (from WWE) in it so I'll watch that one and see if it's as bad as people say it was. Also, I don't know his involvement in it but he's a producer or something of TNT's The Last Ship, which is a great show.
The only thing I've seen from Uwe Boll is "BULLSHEET AVENGERS DIRT" from his amazing online rant.
It's close but I'd say Michael Bay wins.