CartyBoston, 
You follow too many people, that's why you see posts you don't want to see.
If you disagree with someone about something important and their posts annoy you, don't follow them.
If someone you follow boosts posts you don't like, unfollow them too.
Be careful about following hash tags.
Be careful about following people simply because you share an instance.
Voilà, your #Mastodon network is fixed, "no algorithm" is your friend.