No, but IMO it's because Dean has grabbed onto "family" as a crutch, it's like something that is supposed to excuse overstepping boundaries and all manner of disregarding of Sam. Because of family. I don't think Dean's perception of family is entirely healthy.

Yes, definitely! I completely agree!

I also agree that it's excellent that Garth seems happy - I hope to see him again, but not at the expense of his happiness.