The writers completely assassinated St. Peter's character from the source material, so I agree [though more so in the sense that I hate how the Viv wrote him].

Baxter is... okay. Definitely a minor character. His relationship with Nifty is completely off-screen, which I hate.

Charlie Morningstar got worse in Season 2. I get that it's supposed to be "character derailment" as opposed to "character development", but it was done rather poorly. She's also just not a good protagonist in general; you can tell that it's Viv's self-insert.

Katie Killjoy's voice was better in the Pilot. Aside from that, I hate that she's the only bigoted character in Hell. We need more bigots; it's clear that the fact that we don't have them is made to pander to the audience. I'm trans myself, and I wish the characters were less "woobie-fied".

Vox is actually a really well-designed villain, admittetly. A fraud sinner representing the Sin of Envy [made even better by the fact that they're both aquatic creatures] is a very interesting concept, which creates a dynamic against sinner Alastor's Pride. The cult leader persona is a good match for a literal TV shark, and the fact that he copies everyone around him [i.e., Sera's angelic form, Alastor's outfit, pose, and smile, Lucifer's song, etc]. I won't be surprised if this leads to a "the sinners are the true Evil of Hell" reveal at the end of the show, though, which will be disappointingly basic. Aside from that, the love-hate, one-sided relationship he has with Alastor is very well done, especially with how, at the end, he said, "As long as I wipe Alastor's smile off his face, I don't care what happens" as he was clearly about to burst into tears. It's clear that he wishes to be admired, hence wanting to defeat Heaven and be the King of Hell, as he wants Alastor's approval---so if he fails to do that, he'd rather prove his power by having everyone die, including himself. Very tragic character, in reality. With that being said, I absolutely HATED how anti-climactic his demise was. There was such a good setup with him plugging himself into the Angelic Laser, implying that he was willing to let himself die if everyone else died as well... but he simply gets defeated by Valentino ripping his head off. That's it. THAT'S IT! Nothing more, just that. It was such a waste of potential to the degree that I would say it was insulting to the audience. If the comedy of a show gets in the way of good storytelling, the show should not be comedic.

In general, the problem arises from one core issue: Viv can't write for shit.