There are often people who have a comment about everything, and when they do, others stop listening to them. These people end up getting even more petty in their comments the more people don’t listen to them. I would have a conversation with this person about the influence they are losing by these behaviors, and that they should focus on only commenting about the important versus the trivial. A great focus should be on commenting in a way that moves the conversations forward (towards a better solution), versus taking the conversations backwards.