This is a great start. I think a first goal should not be to replace big tech, but the create thriving alternatives. You should not have to feel that you are missing out by not using facebook, twitter, instagram, reddit etc. And with Mastodon/Lemmy/kbin we are getting there even if it is very very early still.

Its understandable that (some) people have this view, they just want to enjoy the content they are used to.
But what I think they are missing is that there are a lot of people that put in a lot of effort in making free content to everyone else, and when a large group of the contributors are upset then this user's "free content" gets worse.
As a user you just have to accept that everyone will not have the same view as you and move on to another place where you can look at funny pictures or whatever.

The best analogy I heard so far is email; everyone gets that you can send an email from gmail to outlook. We are just not used to that websites can interconnect with each other but give it some time and it will be second nature to people