If that ran online, I'm OK with it. In print, ugh.
We've all been where that guy's been. Mid-to-late 20s, you know more than everyone, you're soooooo proud of how unbiased you are and a win or loss doesn't matter to you. It's typical high school reporter mindset. I had it at the same age.
Things change. When I had my first kid a then-co-worker said I wasn't going to be as harsh as I was. I told him no way. I'm straight journo, thru and thru. Turns out he was right. When I do get a chance to cover things, I'm not "rooting" for the team I cover; but I'm not rooting against them either. If you're covering high school sports like it's pros, you need some perspective. That doesn't mean don't work a Friday Night like it's not a Sunday afternoon; just think about what you write.
Have fun covering high schools. Don't be jaded. Life's a lot more fun if you just relax and enjoy it.
(And if you really want to shut the parents up, keep a running tally of what teams you cover and what sports you cover and publish it online for all to see. Then when parents say "you never cover us because you hate us" you can back up your point with facts, not overwritten columns like this)