Who says Google can't favor your site?
Well they can, if you follow the right process. A research statistics by Google revealed that, "72% of consumers want mobile-friendly sites and 67% of consumers are willing to buy a product or use a service on a mobile-friendly site."
Forget about the penalty that you got (if any), and just focus on the rewards of the moment. And remember that most SEO advice no longer works.
Google mobile friendly update is almost 30 days old, and a lot of sites have lost their rankings. Some others benefitted from it. More so, what can you do right now to improve your search traffic and rankings? This update is for your good, see it that way.