Did you try to look at IPFS codebase size?
~/kubo$ find . -name \*.go | xargs wc -l | tail -1
59629 total
~/irssi$ find . -name \*.[ch] | xargs wc -l | tail -1
88551 total
Obviously ipfs doesn't have the chat UI, ipfs is just a protocol layer.
But it is a more complicated protocol than IRC, so you'd expect it to be larger. I don't think it's large out of proportion, certainly not large enough to call it a "MONSTER software".