If we could stop pretending we're superior to other social media that might be a start. The number of posts talking shit about the "average redditor" or suggesting that we need more "high quality content than reddit", or that everything needs to have a meaningful discussion is exhausting. We as a group seem to want to dictate who can comment, who can post, what kind of post is acceptable, and are fairly mean to newer people. You won't keep new people if you're rude to them or they see post after post trashing them.

Engagement comes at the price of low effort sometimes. So does content. Not every post or comment will be a shining beacon of perfection. Sometimes people just want to talk. Some of them are starved for human interaction.

Stop trash talking the lurkers. They may be sharing what content there is here and driving people to Lemmy instances. They're an important part of the ecosystem.

Ask what caliber of people you want here. Because it is very apparent to me that the loudest members only want a specific type of community member here. And they are very outspoken about that fact. But are they actively extending a hand to those people when they encounter them on any other platform? Word of mouth (or keyboard) works. It's slow but it works.