Literally how do you think people get views and reads? If you take down your fanfic, how are people ever going to read it? They're not.
That's the point. It takes time for people to discover your work, and in this business people finding out about it usually spreads via word of mouth, which takes time and buildup.
As far as I know, a lot of older, more fandom-dedicated folks don't use wattpad. They're on A03 (Archive of Our Own), tag their works heavily, and then advertise it on tumblr. Fanfiction.net is a bit old by now, but it's still going, too.
Taking it down does nothing. You think it's bad? So? What's the argument to not leave it up there, unless it's under your real name? My Immortal, a godawful, godawful fic, is a classic. You want more attention? Then taking it down is the worst thing to do.
What you're doing is seeking validation for your work and effort. For someone to say it's good so you can get an immediate high off their response. That's how mental illness works. But you won't get it that quickly. There's no such thing as an instant high without a cost.
You just need time, and patience, and trust in your own ability. This is all just your anxiety speaking.