Cheating as defined by the Merriam-Webster dictionary: "to break a rule or law usually to gain an advantage at something."
Whether your morals reflect that of the rules is person related, but taking steroids in college athletics is 100% cheating. You could rationalize it by saying, "almost everyone else is doing it," but that doesn't mean you're not cheating.
I played college baseball and there were only a few of us not on gear.