Looking for advice on a SEO campaign ranking pattern

Hello everyone,

I'm wondering if any of you have experienced this weird ranking pattern on their SEO campaign. The ranking is fluctuating between 2nd and 8th page of Google. I've attached the ranking chart. I've done everything I can think of(Fix On-Page, build generic anchor text links, build links from different platforms) and that's why I am posting this to get others advice.

Let's say the attached ranking chart is for "Blue Widgets" keyword.

Another interesting thing I noticed…

Looking for advice on a SEO campaign ranking pattern