Yeah, I'm not sure how else they could've ended it, but I wasn't particularly satisfied either. I did love everything building up to the last moment.
It really felt like everything was unraveling for him. And the honest moment with the fridge repair dude was particularly compelling. But the final 2-3 mins, I don't know.
But then again, if they probably went for a more generically "satisfying" conclusion, it might come off as inauthentic.
The other possibility, I guess, would be to somehow kill him off. That would've again been unsatisfying, since it was never that kind of character drama.
So, it's probable that this was the most subtle and open-ended way to finish it. This way they also leave plenty to the imagination, as to what you read into it. Regardless of what the creator envisioned.