So delegating to a single centralized entity (which votes on whomever it wants, usually within its own community regardless) is better than delegating to another centralized entity which votes on a potentially slightly smaller pool of people?

It depends. The smaller the pool of vote recipients, the worse. And if there's a tit-for-tat mentality involved it's the worst. Not sure how you don't understand that.

Overdramatizing the effect of his downvotes doesn't make you seem smarter either. He took some rewards you bought, that's it. Get over it.