Most Helpful Guy
I'm not sure if it's the worst I've ever seen, but I took a date to see King Solomon's Mines (the 1985 remake) when it was released, and it was so bad that we asked and received permission from the theater to go to a different movie after about 20 minutes.
And a buddy of mine was (and probably still is) into video game movies, and wanted me to go see Mortal Kombat: Annihilation with him. I wouldn't go, so he offered to pay. Having nothing else to do, I went. It was just as awful as I suspected, and I had a good laugh at his expense.
Most Helpful Girl
You Again 2010 with Kristen Bell.
Basically the message I learnt from the movie was:
It's ok to bully someone for years and only apologized when you're caught and when the bullied victim is forcing you to apologize even if it's not a true, sincere apology and they had to demand it from you.