There is a difference between capitalism and capitalism-without-rules (which some might call libertarianism). Capitalism is meant to have rules to make it fair and prevent anarchy, just like, say, football has rules to make it fair and prevent anarchy. The rule makers are the government and the rule enforcers are/is the legal system (like in football, the FA makes the rules and the Referees and others enforce those rules). So while capitalism incentivizes business creation and innovation in the name of money-making, there are supposed to be checks and balances to make it fair and in the best interests of all citizens.
Capitalism today especially in the United States is practiced more like capitalism-without-rules where the government is owned by capital owners and therefore does a poor job of making rules that are fair for all and a poor job of curtailing unbridled capitalism. It also appears that the highest level of the legal system in the US is also heavily influenced by capital owners.
I suspect what the “hate” is about is the way capitalism is practiced today.
If capitalism was being practiced responsibly with checks and balances by well-functioning governments and judiciaries, then there would be less hate. This will only happen if people hold governments accountable through protest. Voting is not enough because capital can “buy” all voting options/parties. Protest has brought many civilizing changes to capitalism, especially in the US in the 60s, but the pendulum has swung back to the public not being organized enough or not caring enough to force governments to do their jobs.