Nah the MC is not uninterested at the end of the current content, its more like he doesnt dare to hope (because allie told him 10000x times to not even think about it lol)
Thats why all the other girls (Jasmine, Natalya, Vanessa) have to point out to the MC that allie indeed seems interested despite her words. Jake himself has convinced himself (or got convinced by allision) that he wont get another chance and is so sure about it that he doesnt even pick up on things like Allison wearing their engagement ring all the time and so on.
Which is what the moments they shared through the first act should help with and why they are there.
At the start of the game she absolutely does still hate him but as we are making the choices, she is getting softer towards the MC and the interactions/outcomes change. Their whole dynamic does.
I can take the moment when Allison invites him for a dinner at their house. They have a good time, they reminisce about the past and she allows him to sleep there on the couch. Most importantly she kisses him on the lips before going to sleep. To give credit to the MC here, he leaves a nice note in the morning when he leaves. If a person that I think hates my guts invites me for a dinner, kisses me and allows me to sleep over then I start questioning whether she still does hate me the very next day because what I thought could never happen just happened.
To dare to think, to show me that not all hope is lost and he still has feelings for her should have been the end status of act 1 on her path. As I said, he might find it hard to do something about it, be scared but I will understand. The path then will actually have more depth and choices where I decide to get closer to her will carry way more meaning.
I thought that the game would have like 5 to 6 acts but found out yesterday that only 3 are planned which makes me question this approach to her path even more.
Just my thoughs anyway. As I said I don't really have a favorite LI in the game and if I had to make a choice, it would probably be Veronica.