Covid is a thing no one wants in their lives. But it is something the whole world had to deal with. This shall pass!
Regarding your worst experiences with the kids, I'm not sure because I don't have kids. But I do remember going through a rebellious period as a child where I said things to my parents that I didn't mean at all.
It's worse that your mental health has taken a hit, work on that because that's what we all need. Mental health is one of the most important things we have, and it is the thing that drives us.
Wishing you all the best for 2022! Bring it on!
RE: Parenting Worst and Best Moments