I don't think EA is utilitarian. Or at least, not in any way that requires objective moral realism. EA doesn't say, "moral goodness is quantifiable and I can prove on graph paper that one life saved from malaria is equivalent to 137 meals delivered to hungry people." It says, "I don't know what goodness is or how to measure it, but I need some way to decide where to donate, so..."
In other words, EA demands that you actually think about where your money goes and whether that's the best place for it, rather than just donating to whichever charity has the most emotionally moving imagery and music in its TV commercials. Once you do that, it naturally follows that almost any system you use will give the same answer: "Sheesh, I should probably donate less to the animal shelter." And I think 99% of the hate EA gets is rooted from the fact that people like donating to their local animal shelter, but can't really justify it.