"estranged himself" is a correct and usable phrase in written English.
It means to emotionally or socially separate oneself from someone or something. Example: After years of disagreements and conflicts, Jack estranged himself from his family and moved to a different city.
The broadcaster Keith Olbermann is famous for estranging himself from his bosses, be it at ESPN, Fox or MSNBC.
Almost incidentally, Sickles married again, but contrived to estrange himself from his second wife and his children.
When first attempting to get published, Winton had to cast his mind to cosmopolitan readers and estrange himself from the native landscape whose stories he actually wanted to tell.
Robert Ross had read Wilde's poems before they met, and was unrestrained by the Victorian prohibition against homosexuality, even to the extent of estranging himself from his family.
But then he was estranged from himself, evident in his uncharacteristically sluggish progress on his ultimately disparaged memoir, for which he would "hammer out single paragraphs, not knowing where they might fit".
It's almost as if the man, having tested seemingly every position in the batting lineup and experimented with wildly divergent styles of bowling and muscular conditioning, has ended up estranged from himself.
But though he is estranged from himself and set adrift in an urban Finnish landscape that -- shadowed by poverty and bureaucratic indifference, the man (played with soulful deadpan by Markku Peltola) is also liberated.
The lyrics to Wish You Were Here "Welcome to the Machine" suggest what Marx called the alienation of the thing; the song's protagonist preoccupied with material possessions to the point that he becomes estranged from himself and others.
And just when he seemed to be opening up the past two years, he now finds himself estranged from his teammates, further away than ever, on the perimeter.
