I regret deletng it a bit too early but I don't regret the deleting itself.
Even tho I spent a week manually deleting comments and posts and then also used a program that allegedly deletes everything on an account, I am still able to google a couple of my older comments. They're no longer attributed to me (it says [deleted] as the name) but the content itself is still visible to anyone ... and I wanted to leave nothing of value on that site. But since the account is deleted now, can no longer manually nuke the leftover comments, which irks me a bit.
I have to admit, I did feel a bit nostalgic at one point after leaving, but just looking at the "front page" of my ex-main-sub for half a minute fixed that pretty quickly. I've legit never seen so many lazy shitposts in that sub at once, and everything that wasn't a lazy shitpost was a post complaining about said shitposts, and the only two posts that were neither a shitpost nor a cmplaint, were super obvious Karma farming bots stealing content from the "top of all time" section. Total dumpster fire.
Long story short, I like it better here.