It's pretty safe to say that Mike Brown and Antoni have shortened Kobe's career...
by playing him 40 minutes a game even though he's now in his 17th season.
Just look at the older stars playing now. KG and Duncan are only averaging 30 minutes a game. Pierce plays 33 minutes. Kobe was only playing about 34 minutes when Phil Jackson was there in 2011. It's just common sense not to play your aging superstar 40 minutes a game in the regular season. The legs eventually give out. It explains Kobe's recent struggles. His body is starting to break down.
Of course the Lakers front office also deserves blame for not surrounding Kobe with any depth, but the coach has to find a way to limit his minutes.