Interesting question, I know. For me personally the answer is no - I have not ever regretted having gotten into bitcoin, despite having spent hundreds and hundreds of hours researching the topic. It's always been an interesting ride.
But I have a friend who got scammed and he regrets having had anything to do with crypto in the first place. It's pretty sad but there's nothing I can do about it. I even offered giving him half of the amount he lost from my own crypto stash (mind you I am not rich) but he's so scared that he's not interested any longer...
Too bad to hear that. Though we didn't know the whole story how he got scammed, sure enough it's really a traumatic one. You really can't blame him. There's still so many opportunities out there that he can dive into as this is not meant to be for him. For me if I also experience the same I won't be like that and will really just enjoy and learn from it as there are alot of opportunities as well in crypto.