My least popular movie take: Walter Peck, for all his fussiness and lack of charm, was the closest thing in Ghostbusters to a hero. https://twitter.com/jmt5050/status/1317502857487163393

The Ghostbusters discover irrefutable proof of life after death, thus addressing the most pressing existential questions in human existence. This single answer trivializes every system of human self-organization and should provoke a global conversation.

Instead, they get a small business license, buy a distressed property, make some cash, get on TV, sexually abuse a shocking number of people per minute of screen time, and what was the other thing? Oh yeah. That.

The totally untested novel particle accelerator running off the NYC power grid in the middle of one of the most densely populated regions on the planet. All to make a buck, because its the 80s, and yay capitalism.

Enter this guy: a lifelong civil servant with a deep knowledge of public health and wellbeing regulation, presumably a post-grad degree in an applicable field, and a vehement horror about the whole untested experimental nuclear device as backpack thing.

He thinks their blasters, traps, and ESPECIALLY the thing in the basement are totally unacceptable risks to the public being fumbled about by serial sexual abusers for fame, money, and access to more people to sexually abuse. He's not wrong. That's the whole movie.

If anything, he grossly underestimated the danger that these anti-regulation free market anarcho-capitalists posed. I imagine he was worried about radiation fallout (did we ever address the problems of unshielded nuclear reactors running all over the city?) or...

...maybe, in his darkest fears, imagine the Ghostbusters leveling a block or two. Maybe a 3 mile island scenario. That would be bad.
But it would not be "we created a psychospiritual singularity enabling a dead God to devour all existence" bad, which is the whole movie.

Walter Peck was definitely out of his depth. He didn't know about the Keymaster/Gatekeeper thing. He just knew unregulated nukes in Manhattan are not good.
Tom Clancy's "Sum of all Fears" is about one portable nuke. Ghostbusters has EIGHT.

And at the end of the day, Peck powered down the containment unit, releasing a spiraling torrent of afterlife rage, avarice, and malice that wouldn't have been there if the Ghostbusters hadn't decided to take arguably the greatest discovery in history...

.... and using it to turn a moderate profit (they would have made WAY more speculating on NYC real estate, a different kind of reckless badness) by hyper-concentrating literal, actual, ontologically verifiable evil.

Like, seriously. "Hey, we discovered souls are a thing, and evil is a thing, so let's gather as much of both into one place as we can and just kinda ignore it." In any other movie, Walter Peck would be the frustrated scientist predicting disaster ignored till ALMOST too late.

In short, the #Ghostbusters are horrible people whose pursuit of profit trivialized the spiritual destiny of humanity and almost wiped out all life on earth, and the "villain" in the movie is the only person in said movie who wasn't okay with that.