What do you mean by "my town is a mess"? What is it you don't like about it? Is it the villager placement, the decoration, are you just bored?
I personally wouldn't reset my village unless I got so bored with it that I wanted the challenge of starting a new one. Unless you want to go through the trouble of restarting, I'd just take advantage of all the things you probably have by now (unlocked features, funds) and try to change things up. Change the paths and trees, make different areas, just make the most of the layout you currently have. That could be a fun challenge and if you don't like it you can always change it again if you get bored with that too.
If you just hate everything about it, though, then go ahead. You should do what's more fun for you, so if you'd rather start fresh you can always do that.