Everyone does things they later regret and it probably won't be the last time you do something you regret, humans aren't perfect. I also regret many things I did earlier. If you want to delete your account simply to make a new one, I'd suggest just moving on instead and avoid doing whatever you regret. The most important thing is probably just learning from mistakes, if you can see you're wrong and convince people you won't do it anymore, they probably won't have a problem with you.