He's on a self-indulgent 'ego trip' with his latest movie, which he wrote, directed, and starred in himself.
Winning was good for our 'egos'. = Winning boosted our 'egos'. [=winning made us proud of ourselves]
a bruised 'ego' [=a feeling that you are not as important as you thought you were]
(..) I have created "something that kills people." And in that purpose, was a success. I've done this because philosophically, I am sympathetic to your aim. I can tell you with no ego, this is my finest sword. If on your journey, you should encounter God... ...God will be cut. Yellow-haired warrior... (..)2003 Kill Bill: Vol. 1