so it was canon that there are other towns. was it the other 6 sins? i dont remember

if so whats Robbie Rotten's lusttown(?) counterpart like.

or in gemeral are there other villains specific to their town's problems?

So the short answer is no, there's not any other canon towns in the show

The long answer is still no, but kind of depends based on what you want to consider canon or not to the Lazytown universe. The idea of there being other towns comes from Magnús Scheving's old stage plays, which the show is loosely based on. They're not a ton like the show, aside from the basic premise of Sporacus showing up in a town of lazy people to spread the good word of sports and fitness. They mention other towns briefly, (BrinyTown and BigTown) but nothing that would indicate the towns all have their own superhero/villain duo. Because a bunch of characters/locations from the stage play canon gets brought over to the show, it's probably safe to assume that there ARE other towns in the Lazytown universe, but we don't know much else about them other than, at most, two of their names.

The theory that the towns are based on the seven deadly sins just comes from this old tumblr post, and isn't canon to either the show or the stage plays. The post spawned a lot of fun headcanons, though!