I have watched the film to the end and felt the ending was satisfactory despite other reviews disliking the ending. I felt the ending was realistic and portrayed the relationship between adam and beth realistically as it was shown they were eventually incompatible. However, what the reviews seem to be missing is that this break was what was needed for adam to flourish in his new job position which adequately suited his needs.
In reality, i would argue this film is not a romance but adam learning to adjust to life independently. It was established at the beginning his father died, his crutch and aid in navigating life- shown through his boss mentioning about how adam's dad convinced him that adam was suitable for the job position. after his father has passed, adam has no crutch and so latches onto beth. although they share a romance later on, this was more of beth needing support through her recent breakup and father being convicted, and adam needing support without his fathers presence.
The ending allows us to see the outcome of adam gaining independence as beth's prior teachings and support has aided him succeeding the job interview and moving house- but also remaining independent and forming friendships.
Overall, i would rate this film a 3 out of 5 for the ending being different than the usual rom-coms i see- usually its more unrealistic. this, however, allows the audience to gain insight on what support can do for individuals suffering from mental health struggles, but also the outcome of what independence can do for people like adam.