Since we're still in Phil's day off land and the rotating discussion topic landed on "Is Phil depressed" I'll throw in my two cents. I think Phil is unhappy, and I'd probably go so far as to say Phil lives a miserable lifestyle. But I don't think Phil is depressed.
Phil seems too, for lack of a better term, animated about certain things to be depressed. If Phil was really depressed, I think he'd be a lot more apathetic towards things. Basically, his whole demeanor would be like when he's playing Yakuza. Phil cares about and gets excited for things. They're stupid things and often reflect a childish mentality, like getting excited at the prospect of fast food or RGB lights. He's gleeful when bad things happen to other people, and he lights up when he thinks he's in a position of power over someone and can bully them. I think he gets some limited enjoyment out of buying random stuff as well.
But because he's Phil, he lives a pretty miserable life. I've maintained for years now that Phil is and will always be his own worst detractor. He continually makes decisions that ultimately lead to a sad lifestyle. Take his wedding night for example, instead of trying to have a fun and memorable evening with his wife, he loaded up Twitter to smugly dunk on his detractors. Depression didn't make him login to Twitter to try and gloat and act superior to everyone instead of having a relationship with his wife. Just like depression isn't the reason Phil keeps burning bridges with the few people who tried to be his friend. It's his ego, greed and poor decision making that burns all those bridges.
While I don't think it necessarily brings him happiness, I think Phil likes getting angry about stuff as well. Usually because he frames it in a way that makes him feel justified/smart/vindicated. He's constantly complaining about things because he wants to call other people stupid, with the implication being that Phil is so much smarter because he wouldn't have done XYZ, or he's just better than some rando. A lot of what Phil does is throw temper tantrums. Generally, when kids are throwing temper tantrums, it's not because they're like...depressed, it's because they're upset something didn't go their way and think acting sad will get them what they want by essentially guilting the other person into doing XYZ. And Phil absolutely loves guilting people and playing the victim. But when something "bad" (by his standards) happens, you can see more legit examples of him being upset or frustrated versus his more performative temper tantrums.
When someone is depressed, I think it's more like...because of their chemical imbalance, nothing can really make them happy or motivated. With Phil, there are things that make him happy and motivated, and there's a pretty clear route that Phil can take to live a better life, but he constantly decides to swerve the wheel and smash into guardrails instead.