Overcoming SEO Plateaus: How to Sustain Growth and Drive Traffic

After achieving significant success with Doctor Uncle’s website (from 37 to 100+ keywords and 400 to 7.5K traffic but traffic is now 600), I’ve hit a plateau. Keywords are stabilizing or declining, and traffic growth has stalled. Why? 1. I don't post blogs 2. I am looking for how can i create backlink ? For repair service ? 3. I create backlinks on directory sites In this category maybe blog guest posting is not possible because of very low sites related this business help me with that..