Cant speak for the JFK-BOS flights, but honestly every other B6 flight 've had has been great. I had a few bad delays due to weather last winter but I'd be curious if you flew a different route, if your experience is the same.
Im not apologizing, I think they are having some serious customer service issues lately related to delayed flights, new E-190s not wroking as planned, etc.
But I can say when I flew US or DL a lot more often it was always, and I mean always a DISASTER. We're talking lseeping on the baggage claim wheel at LGA beacuse they wouldnt put me up in a hotel and it was 230 am due to a machanical on US. That took the cake.
Sorry for your bad flights. Looks like Acela might be the way to go for now as the shuttle prices are hefty now too.