I've essentially been on this website for 7 years (mind the join date) and I must say I have changed a lot as a person. I can literally recall certain moments that I've had on here and they are less than impressive, and they can definitely be deemed cringey.
Although when I remember those moments I also recognise the fact I was a young person that had many personal struggles (facing the same troubles currently but with more years on my head and rationality) and have only recently started to evaluate everything and have turned a corner but starting to have a little more faith. The countless arguments and bitterness on this website, an Animal Crossing forum, is kinda shocking and I am not gonna do a U-turn and say that I was in the wrong everytime because I definitely wasn't due to the sheer amount of "not nice" people that I've conversed with on here; which is basically the same with any other place on the internet, that's just how it is. The manner that I had spoke in from time to time was naive and I could have definitely had stayed true to my self and not have gotten into unnecessary confrontation, it's just not in my real nature.
The only person I had let down in those days was myself, I'm better than that now. I have bigger things to worry about now and I've grown considerably. I've let go of any lingering grudge because at the end of the day, I'm simply unbothered and I just wanna play Animal Crossing.
I don't think anybody should kick themselves for being stupid or cringey in the past, only kick yourself if you were being a legitimately awful individual which I'm sure nobody here really was because if you're willing to recount your past and feel embarrassed by your past, it means you've grown. A bad person would never recognise a bad past because they're still bad in their present. So don't sweat the little things gang.
So no, I wouldn't make a new account. Ever.