Prime mike tyson

I've watched a lot of tyson fights and documentaries over the years and a prime mike tyson had great defense and amazing handspeed (best handspeed/power in a HW) So why do people rate a prime mike tyson less than other fighters. I'm not talking about the losses vs danny williams nor am i talking about the buster douglas fight where he didn't bother training for. I'm talking about fully focused trained prime mike tyson prime tyson was unbelievable, that was the tyson before douglas and before all the mind fuks he go with robin gibbons, don king and money and before he got rid of his trainer.. if cus lived tyson would have reigned for much longer!