One thing I don’t get. Among the gazilion “Oh, it is sooo easy to do this better” complainers are countless developers and designers. This whole Mastodon thing is Free Software, where countless people spent some of their free time and energy to give you what there is today. Complainer devs and UX folks, are your PR’s getting rejected?
There’s no responsibility at all. There’s also full freedom to complain however you wish. If you do that on someone’s free work with which they try to help others, it just doesn’t look very good on you. That’s all.