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]
(..) You become a Doctor to save one life above all others. Your own. - Still seeing through me, are you? - I see what I've always seen. Your overinflated ego. You want to go back to the delusion that you can control anything, even death, which no one can control. Not even the great 'Doctor' (..)2016 Doctor Strange
(..) Not everything has to. Your intellect has taken you far in life. But it will take you no further. Surrender, Stephen. Silence your ego and your power will rise. Come with me. - Wait. Is this?... - Everest. It's beautiful. (..)2016 Doctor Strange