What I don't like is the cultish behavior, and inherent bias that what I think is good is "universally" good. Effective altruism is nothing more than a rebranding of utilitarianism, and suffers from the same moral quandaries.
Should I kill someone if it is the best way to decrease child mortality rates in Africa?
Should we all quit our jobs to solve friendly AI? Because if not there is a non-negligible probability of human extinction, and the math clearly says this should be our top priority.
I think it's healthy to be aware of the short comings of effective altruism as well as its benefits. Morality and duty are too nuanced for a single ideology to provide all the answers.
Edit: wording