Junkrat's location while he is using his Rip-Tire is easily predictable and he's very underpowered, he needs a buff asap. Maybe make him immune to damage or at least invisible during Rip-Tire.
In what way does junk seem underpowered, unlike every other ult, if you kill him during it, he can still use it. You have to kill his ultimate which happens to be one of the more devastating ults. This is 100% jebait but still