Squick - Some of the more dreadful fics; it's a charge for a reason.
Strangled by the Red String - Cupid and Stephanie fall in love rather quickly, all things considered - even having known each other for a few hours at best, they're already treated as a couple at the end of the very same mission where they first meet. Their next mission together not only lampshades this by being titled after this very trope, but also deconstructs their relationship somewhat by making their respective flaws - Cupid's Hot-Blooded-ness and Stephanie's crippling insecurity - into critical obstacles for the two of them to overcome.
And of course, anytime a Mary Sue or Gary Stu makes a canon fall in love with him or her at first sight - an unfortunately typical charge in far too many badfics to count.
Tear Jerker: Some of the agent histories are pretty damn depressing. In particular, Gabrielle is a cute fluffyFlareon... who was discarded as useless by a competitive player. Her trainer was abusive, insulting her and devaluing her existence until she reached the point where her entire sense of self-worth is based on what others think of her.
After the mission where this was first explored in any depth, Gabrielle was tasked with keeping a diary by her therapist. It's presented in a similar manner to how she speaks, but we get a vague idea of what she was put through by Tempest. Anditisharrowing. Though she does get a little Hope Spot at the end.
I'm not weak.
The ending to Little Miss Mary.
"Good-bye, Alex. I love you."
Alex tried to grab her again, but she ducked inside and the door slid shut behind her. Alex pounded his fists against it. “SABRINA!” he screamed. “DON’T GO! DON’T GO! YOU CAN’T DO THIS! PLEASE! COME BACK!”