I think what most people would disagree with is your calling a team that has achieved a winning record in one of the top conferences in America "garbage". Even if they lost most of their games miserably, they're still college kids who have put in an unbelievable amount of work and number of hours, of which we see only the tiniest part. For that reason, you would do well to choose a word other than "garbage" to describe the team. I have no idea what you do for a living, but you probably work hard, and you probably fall short of stellar, like most of us. You probably wouldn't appreciate others calling your efforts "garbage".

I'm guessing most of us don't watch Michigan like a movie critic. Probably more like - depending on our ages - a younger sibling, an older sibling, or a parent. No parent I know has ever called his kid's genuine effort at something, no matter how pathetic the results, "garbage" (let alone calling the kid himself garbage, which is what you did). It is usually possible to be honest and tactful - even kind - at the same time.