In my experience it's almost universal among heavy Scheme contributors to feel that others are ungrateful, uncooperative, or unresponsive from time to time. Nowadays most of it is due to the fact that Scheme has too much work to do relative to manpower, so everyone is scrambling to get things done as best they can while figuring out what to do at the same time. Scheme is currently in a place where we have many promising ideas floating around, but no one obvious idea that most people agree is the most important thing to work on. That's why people are prone to go their own ways and find it hard to coordinate.
It also has to be said that Scheme is a magnet for people who excel at being creative and independent-minded, but such people are by their nature less predictable and less organized than most. If anyone wants the kind of innovative thinking and long term resilience that goes into Scheme, community organizing is necessarily going to be difficult. It's reassuring to keep in mind that we are not doing anything wrong because it's hard - it's an unavoidable consequence of the type of people we have.
The bright side is that creativity has never been our problem; many communities cannot say the same. Predictable and well-organized communities look good in the short term, but long term (e.g. 50-year timespan), the creative communities are going to be the ones that stay relevant.