I would have to say SFMM.
Ride operations are awful, no airtime on any coasters, park filled with So Cal thugs, advertisements on coasters now, absolutely terrible flat ride selection, line jumping everywhere, no family rides, poorly planned coasters built on parking lots with the only intention being to rival CP coaster count, and finally, it's rare that all coasters are even open. I have never been to the park when Deja Vu was open.
Our mom would hate when we went there without adults because of all the trouble. Security was as pitiful as the ride operations. I think maybe instead of adding a new coaster every year they should invest in some better security, flats, and family rides. I used to love this park because of the coasters, but after moving out of california I realized what a dump this place truly is. To be honest, the coasters aren't even that good. Goliath is a snooze fest,Superman is the most overrated ride of all time, while Batman and Scream are nothing more than cheap clones. Tatsu and Riddler are my favorite rides in the park, but other than that there is nothing worth waiting over 15 minutes. I would recommend at least 10 parks over this place. If your coming to America from over seas, I would recommend skipping this place.