You just posted a few days ago that your town got corrupted. I thought you had to start all over again, so I would assume that you have a lot to do in your new town.
When I'm bored with my town I change things, clean out my locker and sell stuff. I like switching up the flowers a bit and finding new paths or ways to make the town more fun. Traveling and making new friends can help. It's nice when you have your town to point where you are proud to invite guests in to play and make island trips.
I would suggest you stop TTing because you said that your town got corrupted 3 days ago and since it takes at least 2 week (talking to sable 14 times) to unlock the qr machine it seems you might be time traveling too much. Try taking it slow and stop TTing so much, you might find it to be a lot more enjoyable.
I have extra towns so I'm busy with those.
I had some extra time and changed the museum from storage to real rooms. Bathroom, island room and perfect/plant stand.
Cleared my saved mail and only kept items that couldn't be reordered.
Every two weeks I clear out the mayor or side players locker. Just keep my favorites. Found winter bugs and fish in my locker last time I checked.
Work on the side players badges. The mayor has all the PWP and is missing one gold badge. My goal is to get all my side players badges finished in the next two years. I have a lot of side players.
As someone said playing with friends helps a lot. You can also visit some towns with their dream code so you get more ideas for your own town, or maybe find new QR codes you like, maybe also create your own ones