Rebel Prince: Mr. Collins wanted Wes to grow up to inherit the family business from him, but his grooming served only to alienate Wes from everyone around him. He jumps at the chance to be a Rookie Red Ranger, as it's the first time in his life he's fought for anything.
Fanservice: There's really no reason for Jen's 21st century outfit to include a tight, tiny miniskirt other than the fact that former model Erin Cahill is one of the most beautiful women to ever put on the pink spandex.
Sliiiightly justified in that fanservice itself is a tactical advantage, since even in 2012 guys are expected to be slightly dazed at the sight of a hot chick, and both outfits do keep her legs fairly free for kicking. One gets the sense that she doesn't really care if a criminal sees her panties, since she'll have knocked them out in five minutes anyway.
Friendless Background: Presumably by choice. While Eric was depicted as being an outcast amongst the snobby rich kids of his prep school, Wes honestly seems to try his best to be nice to Eric, and is subsequently pushed away.
Ungrateful Bastard: Considering that Frax was kind to him and saved his life purely out of the goodness of his heart when Ransik was shunned by most, it was really a dick move to steal all the serum and leave him to die.
The Farmer And The Viper: Ransik was rescued and given life-saving medical attention by Dr. Ferricks. He responds to this kindness by setting the doctor's lab on fire and leaving him to die. This makes things rather awkward for the series' later attempts to sell him as a Magneto-esque Anti-Villain.
Heel Face Door Slam: Via being reprogrammed and effectively wiping out the last traces of the person he used to be right when he sees hope for the possibility of ending the cycle of hatred.