I thought the "you can do better than this" line was directed toward the commenter above them.
That is, the user Ogmios made the original comment about "Mustache rides." Then Catoblepas said "you can do better than this" to Ogmios. You responded to Catoblepas, but it sounds like you intended to respond to Ogmios. That's why I said it sounds like you were in agreement with the comment above yours.