Unfortunately, I have to agree with you.
I have the same experience. I’ve posted some issues and questions related to the email and communication part of ERPNext on the forum and also posted some issues to GitHub.
Unfortunatly it seems that there is no interest in the CRM/communication part from the core developers, as you already discovered. Something I find hard to understand as the CRM module is one of the key parts of an ERP system.
I can’t tell you what to do, as long as there is no interest from the community or core development team to address some issues, we’re in the dark I’m afraid. 
@Julian_Robbins is trying to initiate some initiatives in the CRM development group but I don’t think there are any developers involved in that group at the moment. So I don’t expect any progress from that side in the short term.