The problem with getting mad at a particular bat flip over another is that it employs the famous Supreme Court Justice Stewart line about obscenity - "I know it when I see it." Whether or not people think a bat flip is too much is often a combination of the player's experience or inexperience, the stakes (is the HR "meaningful" or not), and other factors like the player's history against the team, etc. Without any obvious and clear line to cross, it's pretty silly to get mad at the one you've defined for the hitter.