I'm so, so sorry you're struggling. Please know we are rooting for you and want to see you healthy and well. I think first and foremost, you should stick to what you know you tolerate well and do not feel aversions to. Eat as much and as often as you can to help stabilize your caloric intake. Try focusing on what you CAN eat and try to enjoy it as much as possible. Secondly, I would definitely suggest getting in to see a therapist who specializes in disordered eating. Yes, VSG changed your anatomy, your bodily needs, and maybe even your tastes, but this is not normative and getting support will likely be a game changer for you. The sadness, depression, and frustration are all completely valid given what you're going through, but you don't have to stay in this place and there can be improvement. Lastly, I'd say you might want to get in to see a GI or bariatric surgeon to discuss. I also had surgery in Mx and had a wonderful experience and have a very supportive PCP at home, but something this severe might warrant a face to face visit with a specialist. If there are any physical factors they should be addressed along with the mental/emotional pieces.
Wish you the very best of luck!