Saying Russell is overrated is one thing. Saying he's Ben Wallace or Theo Ratliff is insulting. The guy won championships at every level. High school, college and pros. In his whole career he only had a handful of years where he ended on a loss. And don't forget he played many years against Wilt, who is also an all time great legit 7 footer. Russell won almost all of those battles.
That being said, it's definitely harder to win now. Old timers will say it was harder to win back then because the league is diluted now. But I don't think you can realistically say that top to bottom talent is even comparable.