You should help out with the gaps in the media stack! That is the only way it will get better :) I don't believe echo cancellation is a hard problem either. I don't know the specific details, but I have heard this argument so many times.

People told me that unless you were a developer at a big company you can't build DTLS, SCTP and RTP Congestion Control either. Maybe the community implementations aren't as good yet, but I think it is a tortoise vs hare.