Can you expand on why y’all makes them feel degraded? Y’all is often used to convey a feeling of warmth towards the addressee or express familiarity, which seems the opposite of degrading.
I can tell you as a gay man I appreciate when people ask about my partner (gender neutral) versus default to wife. Am I offended by it? Not really, it's right 90% of the time. But it's nice that people are considerate of other options when they don't know themselves. And you don't know that I'm gay by looking at me. Many women you do know they're not a man, so you would already know that you're using the male pronoun as default for all people when you could be more contextual to the situation (and avoid pulling the entire history of male-dominated societies and language with it).
I've seen "partner" being used in reference to hetero relationships more frequently in the last decade, and think that's probably a good development. "Boyfriend" and "Girlfriend" sounds a bit infantilizing to me when used in reference to adults.
One argument in favor of using partner is that boyfriend/girlfriend is ambiguous. My wife often refers to her close female friends as "my girlfriend", even though they are clearly not dating each other. It occasionally causes some confusion with people a generation older than us who aren't familiar with that usage.