Unfortunately, there's no easy way around it. Fediverse is small, and while we should always encourage people's migration, it will probably remain small for the time being.
And freedom to express everything combined with people learning their behavior on algorithmic content will be an issue until a strong Fediverse culture is established. The times of pioneers are over, the times of "truly a place for everyone" are not yet there, and in between, we have a very weird mixture, sometimes bringing out the worst of many people.
I hope Fediverse will survive through this phase, and if yes, bright times will be ahead. But it will take a lot of work. Many non-political communities have already started blocking political content, and for the time being, I believe that's for the better. People need a place to chill and have a corner of their own, not face what they ran away from in the first place.