whoa, whoa, whoa! back the truck up! I would keep George Lucas off the list. First half of his career was the bomb! second half was not as great, but I wouldn't call it a complete disaster. He's definitely not on a worst directors list.
Patty Jenkins doesn't have enough movies under her belt to fully say she's one of the worst. She has Wonder Woman and Monster. Which Monster went on to to win some Oscars. She's also directed some episodes to some popular shows on different networks.
Michael Bay in the 90's was some of the best Bay we've ever had. Recently his stuff hasn't been that great, but I wouldn't call him the worst. He knows what he likes and we all know what to expect from a Bay movie. They're over the top action packed popcorn flicks.
A Director like Dennis Dugan would be on "worst directors" list. He did the Grownups Movies, Jack and Jill, You don't mess with Zohan. So he works with Adam Sandler a lot.
Uwe Boll is another director that should be on the list for one of the worst directors ever. Just look up his "oscar" winning movies!
This new movie from Snyder looks massive in scale. Supposedly he's been writing it for a while. So if you enjoy movies written, directed and produced by Snyder, than I suspect you will enjoy this extravaganza. From the trailer it looks like a lot is going on. I just hope he was able to get the budget and time to make sure it turns out great.