Because Jeffrey Marsh loves playing armchair psychologist, both with his detractors and with his audience, Imma try my hand at it myself in regards to a psychological analysis of Jeffrey Marsh.
Keep in mind, this is the most charitable interpretation of his behavior and personality I can muster:
Let's start at the beginning. His childhood. He mentions being bullied at school and being abused by his dad. He chocks these things up to one of two things, or both:
1. Homophobia
2. Hatred of "extroverted" people in general.
It's extremely unlikely that Jeffrey would have identified as gay during his childhood, so that narrows it down to the other option. However, he also admitted to doing some pretty fucked up things in his childhood, like steal women's clothing, so it's not being "extroverted" that annoyed them so much. It's very likely that Jeffrey did other things than steal women's clothing as a child, and thus built up a reputation for being an annoying sex pest.
Obviously, school bullies would definitely take advantage of that, and use it to beat Jeff over the head with.
While it's tempting to say that Jeffrey should have been bullied harder, keep in mind that even for normal people, that one's bullies can bring up good points about one's behavior or conduct or outlook on life is a difficult pill to swallow. For a lolcow like Jeffrey, it's nigh-impossible. Thus bullying is not an effective teaching method, it's a shock-collar method at best.
Bullies, by definition, do not have your best interests at heart, even when they speak the truth about your idiotic/degenerate/self-destructive behavior. Their goal is to fulfill sadistic urges, not to foster self-improvement in others.
Which is to be expected. It wasn't the job of Jeffrey's schoolmates to be his psychiatrist or to fix him anyway.
The behavior of his dad, on the other hand, is somewhat less excusable, even if it's perfectly normal to have a strong, visceral reaction to your child doing fucked up shit like snowdropping. It is the job of a parent to ensure that their children grow up into their best selves. Instead of yelling or screaming at your child, or beating them, whenever they do something wrong, it's better to take a step back and figure out why they're acting that way in the first place, and of course, get them the help they need.
Children seldom act perverted unless something planted that idea in their head. Anything from early porn exposure or sexual abuse. Jeffrey has mentioned being a CSA victim a few times, mostly as a futile attempt to deflect criticism for being a nonce. However, the only thing he accomplished was providing yet another insight into why he is so fucked in the head to begin with. Again, Jeffrey Marsh cannot blame the sexual abuse on him being "gay" or "extroverted" because pedophiles are simply opportunistic, cowardly predators, they do not discriminate based on any criteria other than who is the easiest target.
Between the school bullies, and facing the wrath of his father, it was clear that Jeffrey never got the help he needed, nor did he get any sort of proper insight into his own issues, mainly his tendency towards inappropriate behavior.
As a result, he learned all the wrong lessons from his life experiences. The only thing he could think to do is was to go full contrarian to both the school bullies and his father, and double down on his fucked-up outlook on life.
While he likes to think of himself as a self-help guru, he's a self-proclaimed physician who refuses to heal himself. In the end, he's nothing more than a deeply bitter, angry manchild acting out of spite.