Do whatever you want. If TF2 is boring you, I'd suggest to take like 30 min of just playing casually whatever you like just to confirm it. If it's not your style anymore, then play something else. I've started playing minecraft again, as well as getting into red dead redemption and hitman 2. Those game's are really fun and really recommend them. There's also a bunch of other stuff, like PUBG or Fortnite if u wanna play Battle Royales, those 2 can be really fun to play with friends and such. There are tons of options if TF2 is getting too boring, take your time to explore!