Don't think its on any streaming platform, I heard A24 have their own platform for watching their films so it might be on that im not too sure though

Yeah I feel like the people not getting it weren't fully hooked thoughout because the ending doesn't spell it out in bold writting its nice and subtle.

All made for the film but the director from what I gather based it on her personal experience.

Yeah they could have easily had a scene at end where we actually see him kill himself and would've been effective but they done it in a super creative and more heartbreaking way.