The argument that Albert Camus actually makes is the there is no way to convincingly prove that existence has any meaning. You put the burden of proof on Camus, and he is putting it on you.

Further, Camus doesn't assert that people can't make up meaning and believe it fervently, but they can't possibly prove their meaning is a universal or intrinsic meaning. Basically, no matter how widespread the belief becomes, it's based on faith rather than verifiable evidence or proovable facts.

You retreat to the argument that someone's argument struck a cord with you. Well, good for you. That proves nothing. If anything, it proves the idea that people come to believe whatever they want about life and each of us makes our own meaning, perhaps through shared meaning we find with others, or perhaps not. Just because you found a meaning doesn't prove that meaning is actually there and exists in any way other than a thought in your mind.