Not everyone. Capitalists love capitalism. It's the people who aren't capitalists but think they are because they love capitalism.
Sort of like how people think they are Christian's because they go to church believe in Jesus, but don't actually follow the teachings.
People think they are all sorts of things they are not and make themselves and or other miserable because of their fantasies.
That's partially because like many other words and names (just consider Isis, an important goddess of ancient egypt), "socialism" to most people means the type of absolute control that communist countries usually feature. But of course, as a word/concept, socialism is just the application of socialist policies, not even remotely alluding to some absolute end goal or so. And naturally as a part of society except a tiny minority at the top, most people would benefit from more socialist policies.