Do I have problems for feeling this way?

People can sometimes really grosse me out. Like some just don't seem clean cause of puberty and stuff. Like so many people at my middle school have so many pimples and BO!...ugh it's making me totally grossed out by human kind. Many girls have have greasy hair too. Me and my friends we actually shower and keep up with our cleanliness, but it seems like human kind are becoming nastier than the cavemen were.