Since Schumacher never finished his Batman trilogy, probably. But even then, I guess, one could argue that Batman Forever might have not been a good film, but at least was entertaining - something Snyder never managed to accomplish.
Webb also never had a chance to finish his AS-M trilogy. I honestly don't remember much about both AS-M movies, but I remember I hated them, even though not as much as BvS.
The Matrix trilogy comes close, I think. But a lot of people like the first one. There are a lot of similarities, though. Pretentious movies that try to be smarter than they actually are, pseudo-philosophical post-it notes under a thick layer of crowdpleasing visuals. Then again, one could argue that the Matrix movies are not superhero movie in the sense that they are CB adaptations.
At the moment I struggle to come up with another trilogy as bad as Snyder's. It is a good question that I can't answer yet. I have the tendency to say, "Yes, it's the worst", but I'm not sure if I'm missing something