Well, we, developers, certainly aren't the most people-friendly bunch in the world.
I have learned so far that many of us have quite profound issues with our assertiveness, maturity, sense of ownership and/or responsibility for things we own. Many of those issues are masked with bloated ego or bad attitude.


I never expect a decent support from an open source project. This makes it a nice surprise if there is one, but in general I am aware what cost is associated with a proper product support. If someone runs the project out of hours, spending time dealing with people asking for something may be seen as a loss of time for coding. An inexperienced developer may not understand what gives his software value so it is a trap very easy to fall into.

Overall, people you dealt with behaved badly. They should have given some feedback within decent timing (a week, let's say), they should have taken ownership for their projects' reliability (if one uses an unreliable dependency and does not defend against this, one is unreliable) and treated others as equals instead of what they did. These people seem like wrong people in the wrong place.