> "Also, it was hard for me to convey this, but the snarkiness of the tweets really made it so much worse. I wish I could explain why."

That's why any halfway decent person online will stick to criticizing ideas, concepts, particular constructions, etc. and make it clear they're suggesting how to improve the project rather than just launching a personal attack on an individual.

There are cases where a particular pattern of behavior by an individual over time can be legitimately criticized or held up as an example of how not to behave, but that's something of an extraordinary situation, most people are pretty decent to others.