Thanks for being so candid. I made the same mistake at my startup when given the chance to start greenfield due to a pivot. I ate my pride and switched back to a monolith after realizing I was spending more time doing devops than I was coding.
If you have a monolith or two you can easily do one off tasks manually and forget about them forever, with microservices it's all about automation.
There are many possible benefits of microservices, few of which outweigh the massive costs for many (dare I say most) startups.