@_trixiie I don't think you need to delete it, just leave it as is and start adding to it again if you ever feel like doing so. Of course, it's only natural you'll improve with time, so if you feel you have then you could always just rewrite it one day.
As for it being "cringe", I wouldn't worry too much about that sort of thing... because it really doesn't matter, lol. If you're actually embarrassed about it, though, you could always just unpublish the work so it still exists in your drafts. I made a few painfully bad works for another fandom when I was twelve, and man, I wish I didn't delete them lmao. They were quintessentially "WattPad phase" (the amount of times I used 'ravenette' was abysmal), but it's fun to look back on and a cool way to track progress. ^^