Philip also has been taught to "make it real." Everything he's saying to Stan here is true, but Philip is no doubt making it completely true to himself in that moment the same way he would "make it real" with any source.
The feelings are real, but he's also focusing on them to the exclusion of any other mitigating feelings. Of course he wouldn't say his life was just shitty--he had things he loved in his life. He loved his kids. Had genuinely happy times with them. Fell in love. But in this moment talking to Stan he's only concentrating on the shittiness of living the lie, which was a genuinely shitty part.
It's not, for instance, like Elizabeth with Paige in the last ep where Elizabeth is defending herself by getting real. Though they're both getting to voice feelings they haven't been able to to this person in the past.
Re: Question about the garage scene with Stan and the Jennings
The feelings are real, but he's also focusing on them to the exclusion of any other mitigating feelings. Of course he wouldn't say his life was just shitty--he had things he loved in his life. He loved his kids. Had genuinely happy times with them. Fell in love. But in this moment talking to Stan he's only concentrating on the shittiness of living the lie, which was a genuinely shitty part.
It's not, for instance, like Elizabeth with Paige in the last ep where Elizabeth is defending herself by getting real. Though they're both getting to voice feelings they haven't been able to to this person in the past.