Attendance was down before they messed with food prices. The blackfish stuff really hurt them and even with everything they have done I still have people tell me today, "Oh I won't go to Sea World they are evil to their animals, I can't believe you go" BS line. They need new owners who can hopefully have a fresh start, but doubt that happens.
I went from SW straight into Universal passes and ride operations are night and day, taste of food was night and day, but operations within the restaurants actually Sea World was better. We went during Christmas season for both parks and food lines were long in both and actually it took longer to get food at Universal. They also had way less ways to customize stuff at Universal. Sea World pretty much accommodated whatever I wanted where Universal flat out won't change most items on their menu. Sea World also had kids meals at almost all restaurants which allow for cheaper family meals than Universal that doesn't have kids on over half their restaurants. Buying a $20 meal for your 6 year old is ROUGH knowing they won't eat half of it and not like you are taking a doggie bag out.
The main issue is the food booths which during Mardi Gras Universal food booth lines were pretty long too, so I think most parks have that issue.
Again, food overall is better at Universal. Sea World had very few places I would even go to because the food was pretty awful. I did like the pretzel place and that line was never too bad. The new pizza place was really good and they had self check out which worked well. We got food super fast during Christmas rush there.
But I 100% agree that Sea World is in major trouble and have thought this since the blackfish stuff came out. I don't think they know how to navigate out of this. They basically angered their fanbase with the show changes and it didn't give them enough good PR to get people into the parks who won't go on principal. Then the foreign travel markets being down really really hurt SW the most.