The amount of time and expertise an Open Source project needs is not coupled to the amount of time an unpaid, volunteer maintainer should dedicate to it.
Conversely, an unpaid, volunteer maintainer has no obligation to dedicate any particular amount of time to an Open Source project.
Perhaps it takes more time to maintain a project to my satisfaction than any maintainer is willing to dedicate to it. If so, I'll be disappointed. I'm used to it.