> it makes sense that companies are taxed differently than individuals. corporate revenues and assets ultimately end up in the pockets of real people, either as wages or capital gains.

But only some of those real people are subject to the jurisdiction of the country taxing the corporation. So while some corporate income is subject to double taxation some is not.

> the real difference here is there are no marginal brackets for taxes paid by a company.

Companies can smear revenue out over time to optimize the taxes they face. People cannot. The marginal part is orthogonal.