The term you're looking for is "edge", and yes I found an edge a long time ago. Made millions of dollars in profit. But unfortunately bookies don't like long term winners, so I have been blacklisted from every site. Sure I can sign up for new accounts, but those will quickly get banned as well.

The most difficult part is not placing the bets, it is finding bookies that will accept my action. 99% of bettors will never know this feeling.