Remember, no one wins at gambling by picking winners, you need to look for value and find where the bookmakers have miss-priced a team in a match. Then you have to deal with all the corrupt behaviours the sports internet bookies will deploy to limit their exposure to you, which is the other reason why you won’t win.
No. You win by being the bookie or better yet, by not gambling. Sports betting is worse than a zero sum game because you gotta pay the bookie too. I'm betting that 99.99999% of everyone who bets on sports loses money.