Page views stats are cool. So are follower numbers. Engagement stats are awesome also. But do fancy numbers attract an audience? Nope.
So, what do you do? Well, you need to focus on attraction first, and then retention. What could be wrong with your current setup?
1. You might be marketing in the wrong place. You want relevant people, not just anyone. Relevance matters. If not relevant, people leave (hence the two steps forward, four steps back your list might be doing).
2. Your lead magnet or opt-in freebie might not be attractive enough or relevant to what their challenge or problem is is cliche, boring, or not valuable enough.
3. You might not be getting people transferred over from social media to your email list. (Pst-begging people to sign up for your email list or asking for follows all the time is NOT the answer).
4. Your website is not converting well sucks. Opt-in forms are poorly constructed, your copy is stiff, or your layout / format looks like a $50 design job.
So basically, you need to get your shit together. Find your people. Create better lead magnets. Work on design and writing. You know, actual work.