Just an option on the parents
I don't think that Bays family is overreacting. Baylen is not an express ticket to military discounts and I think Colin is rushing the relationship for this very reason.
Baylen is a severe medical needs individual with the potential to harm herself at any moment, her parents have alluded she has had milestone delays because of her condition. And in the same sentence made a reference to Colins immaturity. Which is understandable because he went and got her a Dimond ring way out of his salary yet he can't afford to live /rent on his own?
The family is just triple checking that he is ready for the future because given Baylens' circumstances, he will have to mold to her needs, and that is a lot to ask from someone. He is signing up to be her partner and caretaker. That is a lot of responsibility that Baylens family of 6? all divide, and still exhausts them.
Like think about it, Colin walked out over an argument about a couch. And in the end the mom fixed their apartment! I think the parents can see through the immature man he is and are truly struggling to be at peace with Bays decision. They see the disappointments and mistakes that normally happen. Which at 20 something is almost to be expected from anyone, let's be real. But these growing pains will be borderline catastrophic each time they happen. The parents aren't going to give her away to just any guy regardless of whether they, Colin, check most boxes because their reality is what happens off camaras and what has not involved Colin since her symptoms worsen. And I don't mean give her away as if she is an item, I mean give her away as in the parents can't fully hand over the medical costs and intense responsibility that inevitably will follow her.
In my option, I can't blame parents. Because if you are a caretaker or work for individuals with intense needs, you know the family is 100% correct for acting the way they are, cold which transcends to us the viwer as rude. And it's sad because everyone deserves to feel love and independence but it's not always an attainable reality. This may be a show for us but it's a reality that they have had to live with for years. I do hope that Bay gets better and that her therapy works and that she can live an "independent life", whatever her definition of that will be, without any major issues.