Laker fan here. I think Kobe did cost the team 3-4 titles. Not excusing shaq's conditioning, but that had little to do with the Shaq/Kobe feud. The truth is Kobe refused to play through shaq, demanded his shots and points, and basically refused to defer to anyone on his team. He didn't have beefs with only shaq. He couldn't get along with Malone, Payton, Fox, and lots of others. He was a bad teammate. In a word, he was selfish.
The other thing that bears mentioning is that because Kobe was such a bad teammate, lots of guys didn't want to play with him. Dwight Howard is probably exhibit A, but the lakers couldn't get free agents for years because of Kobe.
Glad to see the page turned.
I respect Kobe's talent, discipline, dedication and toughness. However, as a person he is NOT someone I would want my children to emulate.