Clerks.

I'm not even supposed to be here today.

I think @protist was close with the Night of the Lepus suggestion, but I think a different movie about a bunch of rabbits may actually be more thematically fitting.

Watership Down

A small group of people/rabbits breaking off from a very large group. Forewarning bad things happening in the larger group that they are fleeing. Attempting to invite others to join them along the way to increase their numbers to a sustainable level. Conflict with another group of domineering authoritarians.

It's all there.

Dumb and Dumber

Napoleon Dynamite, or something equally “short breath of laughter” funny and completely nonsensical.

I thought Pushing Tin was the aircraft controllers movie.

There is a Canadian movie called "Beans", but it's a drama...

Based on true events, Tracey Deer's debut feature chronicles the 78-day standoff between two Mohawk communities and government forces in 1990 Quebec.

And of course there's the documentary about Lemmy Kilmister that is called - lo and behold: "Lemmy"

Night of the Lepus

Another option:

Tommy

(Yes, this is Ann Margaret in a pool of baked beans, about to get hit with chocolate syrup)

Lemmings

Is there a film called Lemmings? Seems a safe bet there is one.

Is there a movie about Marxist nerds yelling at libs? I'd watch it if so

I'll nominate an underdog: Alphaville.

Basically unknown, jerks you back and forth between genres, simultaneously art house and amateur, and the main character is named Lemmy Caution. Sure he's a government agent, but he's the good guy out to destroy the mind control computer on a distant planet by pitting daughter against father.

Edit: and I forgot to mention it's in French.

I'm not sure, but probably not "Red Dawn"

Given the general social aptitude of this site I'd say The Perks of Being a Wallflower

Four Lions

I think Mallrats is very in this vein - just more PG than Clerks.

The Death of Stalin

https://youtu.be/E9eAshaPvYw

A Bug's Life

Its here somewhere.

This movie.

https://youtu.be/YL7U-PH0X8w

The Last Days of Disco.

Underdog

Hundreds of Beavers (2022). Dunno why. It just feels right.

Office Space, but also the IT Crowd