My biggest issue with them is the big (ha) custom emoji they use. However I've heard they're meant to be smaller and this is a lemmy bug that will soon be fixed. I'm content blocking users/communities at the user level until I personally see more egregious content from them.

Note: I'm basing this off my personal interactions with their users generally in comment sections. I'm not browsing their communities. At most I find them slightly obnoxious but personally that doesn't justify cutting them out of my experience entirely just yet.