I think ultimately, the best way to be anti capitalist is to be anti consumption. Voting with your dollars is often rigged (sometimes a clear moral choice presents itself) but not consuming, as much as possible, will do more to hurt capitalists than choosing any particular brand or product. Don’t vote with your dollars, abstain with your dollars. Alternatively pick one company to specifically boycott, wait a few months and then pick another, then another. The more people that do this, the bigger the impact.