Originally, the complaint was that Jeph is neglecting long-running characters in interesting multidimensional relationships to spend a lot of time on newer characters not in relationships whose primary character trait is 'wacky'. In other words, people are relating to the long-running characters just fine, and want more of them. I have no idea how that was interpreted as "too many of the long-running characters' relationships are unconventional and that makes them hard to relate to."

Frankly, I find it hard to understand that interpretation as anything other than someone having an ax to grind about unconventional relationships making them uncomfortable, and projecting their discomfort onto others' unrelated criticisms.