Kids who don't see their parents get mad now and then will have no reason to behave. A parent who doesn't lose it a little at their brats and scream at them or punish them in some way is a parent who will have a child that isn't afraid of consequences because there won't ever be any. It's like letting a little air out of a balloon every so often instead of letting inflate until it bursts. When parents have to hide all negative feelings and words from their kids and instead pretend to be calm, they are bottling up their anger, which they will then proceed to take out on other people or things that don't deserve it, or they'll blow up in one colossal fit of frustration and rage and will proceed to severely verbally or physically abuse their kids because it'll be weeks, months, or years' worth of pent-up anger flowing out.
And because kids are kids, they looooove testing boundaries and seeing just how far they can push Moo and Duh. Instead of teaching the fuckers to knock that shit off by spanking them or punishing them some other way, the parents just decide to use gentle words to calmly discuss their kids' feelings with them. Which, as we all know, does fuck all. So the kid has no reason to quit being an asshole because hey, they just did this bad thing and got away with it.
It's not good to bottle things up like that. I know, I do it all the time and there have been moments when it caused me actual physical pain. Bitch your kids out when they deserve it. They won't be scarred for life hearing "no" once in a while, and it's better than the alternative of not yelling at your kids for four years and then beating them to a bloody pulp for 45 straight minutes because you can't take it anymore. And because that release feels so fucking good, it'll be hard to actually stop once you start.
But yeah, if you're yelling at your jacket because it won't go on, I think there's an anger issue there that probably requires some therapy or medication. Because it's only a matter of time before that anger gets directed at Bratleigh and he winds up strangled after telling Mommy "no" one time too many.