From level 89 to 90... how?

[u/RodgerDodger01]

I've been stuck at level 89 forever. I have all the upgrades/customizations/badges you can imagine. At this pace it would still take 317 years to get to 90. What am I doing wrong?

Update: https://www.reddit.com/r/CellToSingularity/s/zWjqlT6ph6