Macguffin
Instead of support, he was simply locked in a mental hospital, like in a prison. And all they did to him was just stuff him with pills, taking him further and further away from sanity. And after that? What do you do with someone who is unstable because you drove them to a mental breakdown and attempted suicide? Of course, locking him in unnatural conditions, where he has no one to talk to, everyone treats him like a thing, and only gives prohibitions and instructions. In such stressful conditions, even a completely normal person will develop depression. If this is how you "love and care" then I can understand why the main character wants to run away. The most ideal thing for him was to change the place, settling with normal, friendly people and creating new connections with adequate partners. If Alpha really “loved” and was not a self-centered egoist, he would let Omega go instead of repeating the same conditions that did not bring anything good once before. Actually it's even worse, because now no one wants to communicate with him normally and explain anything, and they have zero respect towards him. Also, he undergone forced uterus removal (without his knowledge or consent) while he was knocked out with strong tranquilizers in the mental hospital. No one even bothered to tell him about it.
Uncommon Alpha
Alternative: 언커먼 알파 The Alpha MC has loved his "Omega" friend since childhood. A friend disappeared for many years. And when he reappeared, it turns out that he always have been Alpha. Now he is taller and has a larger rod. And MC was like, “no problem at all, now I’m the bottom” (he had a dream about being pinned as soon as he found out about his friend). Like, based on the difference in height, they decided it right away without discussion and because the MC should always be bottom and he is smaller? They could at least create a little drama on this topic or something, where the characters would again “get to know each other” and love each other for who they are now, otherwise the Alphas seem flat, and their romance is cardboard-deep. Completely ignoring Alpha features.
Feel My Benefit
Again, the dumb and weak-willed (Omega) MC with the naivety of an eight-year-old, who knows nothing and can’t do anything without his bulk-Alpha... can’t stand up for himself, but he can do 50 shades of embarrassed blush, surprised bulging and tearful eyes.
Wish You All the Best
Useless 'cry or blush' bottom
Alpha Buddy