* why I am doing that
* plethora of burned-out maintainers and their posts
* how I am going to deal with the issues/PRs, toxic entitlement
* what's my exit strategy
The first thing before you go into open source (provided it's actually used open source) is to answer these questions honestly for yourself. Because it's massive time sink with no money and *there will never be money* (unless you go open core or your employer pays you, in that case that's just a job just like any other).
I don't view people taking the time to open issues as entitled people, but people offering their free time providing invaluable feedback.
Those issues are quite often different from what I expect, and they represent of how people are using the software.
The only mistake the author did was waiting too much monetizing, not doing open source software in the first place.
BTW good luck to scaling up to $60k / month, it will be fun