Well why dont we ask Evander Holyfield And Lennox Lewis Both guys were desperate to cement their legacies by beating MIKE TYSON.
The answer is yes. That's not a knock on Mike Tyson, he was a great HW but some rank him much higher than where he should be. In the 80's the HW division was very weak, there were only a handful of great fighters in that era and Tyson lost to all of them. So yes, he's overrated because some people think he's the greatest HW of all time and he's not in the top 10-15 IMO.
if he had kept his career at the leve lit was when he was 21, even until he was only 30, then he could have laid claim to being the GOAT. But he didnt. Pity, because he had the greatest headstart (apart perhaps from Ali, Louis and maybe Floyd Patterson) in HW history.