Meaning of the ending
I think it is very clear that the movie has intentionally unlikely ending, with all the problems of the main character suddenly resolved, one after another,without any effort from him. And all this in last five minutes, when the whole movie before that headed in different direction,and in different pace.
First time I watched it I thought that this was his narcotic dream, since
the U-turn was after he takes drugs and falls asleep watching the game. But after seeing it second time,I think, that it was simply intentionally implausible happy ending, a plot device,to be a parody of whole "happy end" movie concept. Something like The Stoned Guest opera, that originally ends with all of the cast dead on the stage. The author was urged to rewrite the ending, because it was too dark, so in final version the whole cast miraculously get up alive and sing "Happy ending" song.