It was left out of Frodo’s manuscript, but when Elrond told Boromir that no one in the council should wield the One Ring, Boromir called them all a bunch of beta cucks who were afraid to step up and be real men. This led to a heated exchange in which Elrond claimed that elves were the real alphas and the entire race of men were betas.
Boromir: i think you should give the ring to me, to aid in Gondor’s fight against the enemy.
Elrond: Boromir, we can’t! It’s not safe to wield the ring!
Boromir: Today is my birthday, Elrond. Do you have something besides the ring to give me as a gift?
Elrond: *whispering* shit, I don’t have anything else…
Boromir: I had a dream to seek for the sword that was broken…
Elrond: yes, that is here?
Boromir: oh, is it a specific sword? You elves lost so many fights against Morgoth I figured you had a ton of broken swords. I didn’t know which one it was referring to.
For his entire time in the Fellowship, Boromir thought that Pippin’s first name was “Foolofa.”
In a hard to find but crucial Fellowship deleted scene, Boromir pulls a few dumbbells out of his sack and begins doing bicep curls in front of Aragorn near the doors of Moria.
In hindsight, Boromir publishing an anonymous op-ed in the Middle Earth Times about how the ring would be safer in Gondor probably led Sauron to attack the city.
Boromir: I know the Hobbit aesthetic is to go barefoot. But aren’t we worried about Frodo walking into a volcano?
Frodo: Hobbit soles are naturally thicker! We never use shoes!
Boromir: anyone can walk barefoot around the Shire! It’s just grass and flat dirt roads. You need to climb a mountain that’s filled with lava! Why doesn’t anyone understand?
If Denethor knew he had the option, he would have sang in front of Mandos to get Boromir back. Probably would have traded in Faramir to sweeten the deal.