Hello,
Sorry for the experience you had while using the plugin. I will try my level best to help you get to the bottom of this.
We have analyzed your homepage and found that there are very few elements that needs configuration SEO

Ensure your most important keywords appear in the H1 tag – don’t force it, use them in a natural way that makes sense to human readers.
Also, try to include synonyms and relevant terminology in H2 tag text. Search engines are pretty smart – they know which words usually occur together in each niche.
We would also want to add that there are a few things you have to keep in mind when using any SEO plugin, not just Rank Math.
1. An SEO plugin alone cannot bring down or bring up the traffic in a day (or even a few days) unless incorrect Meta Tags are used by setting up the plugin improperly. That’s why we have a detailed tutorial on that:
https://rankmath.com/kb/how-to-setup/
2. All the SEO plugins add Meta tags for the search engines which can be checked by viewing the source of a page. For instance, here:
view-source:https://rankmath.com/
Other popular plugins generate similar tags:
https://i.rankmath.com/n94KyH
And with the Rank Math plugin, additional tags are added to a page so search engines can understand the content on a website better.
3. Google brings a new algorithmic update several times a month and the chances are great that your website got hit by that.
We have a full guide on that: https://rankmath.com/blog/google-algorithm-update-recovery/
And if you are using Rank Math PRO, you can even see if the drop in traffic co-relates to an algorithm update. Here’s how:
https://rankmath.com/kb/google-algorithm-updates/
FINAL STATEMENT
– If your website is doing good on SERP, Rank Math is your best bet to improve the rankings further.
– If your website is not doing good on search engines, Rank Math is the best option to move into.
– We are pretty open in communication and how we are dealing with things. One can check here:
https://www.facebook.com/groups/rankmathseopluginwordpress/
and
https://rankmath.com/support/
Hope that helps and let me know if you need my assistance with anything at all.