My life is ruined and I suppose I only have myself to blame.

我的一生都毁了，我想这只能怪我自己。

《柯林斯英汉双解大词典》

I went into this with my eyes open so I guess I only have myself to blame.

我是明明知道做这事的后果的，所以我想只能责怪我自己。

《牛津词典》

I have nothing to blame myself for.

我自己是无可责备的。

youdao

And I have no one to blame but myself for my self-inflicted wounds.

CNN: Transcript: Clinton's remarks at Orlando fund-raiser

This time, I have no one to blame but myself.

CNN: Petrino fired as Arkansas head football coach

But maybe I should have closed it out earlier not to be in that position, I can only blame myself.

BBC: SPORT | Tennis | Nadal loses to Youzhny in Dubai