Guess you right - betting on your team might be exactly that
And this is probably why it's more logical to bet against your team cause that way you would have win-win situation ...
You can't mix passion with gambling. It will certainly end up making bookmakers rich.
I think it's worth betting on some markets in certain matches of your favorite team, because you must know a lot about it, follow the news daily. But these bets should be based on knowledge and not passion.
In order to be successful in this business, you need to start from statistical data, fundamental knowledge and the latest news. Everything else is superfluous.