It does seem like a large number of Lemmy users are elitist snobs. I thought this place was turning out better than Reddit, but it's looking like I was wrong. People like that ruin platforms like this and sour the experience.
FOSS and focus on privacy does that to some people, they feel superior because they worry about those things they see as being beneficial.
I'm sure many of the users from the before time were here specifically to not use a closed source, data gathering platform, so they're a bigger proportion of users than they were on Reddit and they tolerate the most extreme elements of their community that also happen to be the most vocal.
TL;DR: Reddit is for normies and now normies are on a platform where radicals were everywhere and part of the majority before they arrived.
There are many entitled people here. Some of them are from linux community. Anything other than that is bad and 1000 posts related to that. Another is sync and other apps. Especially open source only good, closed source everything bad. My feed was full of that. Even though I am a sync user i feel angry when seeing so many non sense posts supporting and against that. Even some communities not related to these are posting this.
The reason why many people swapped was because Lemmy harbors smarter individuals. I need to feel superior simply because I use Lemmy, Otherwise there's no point.