When I was 22, I thought my criticism was very important. A few years later, I often find it overwhelmingly detracts more than it helps. Critique ahould be differentiated, in that there's a much better chance that you're actually contributing, rather than just being perceived as trying to draw attention to yourself. The less you tell people they're doing something bad, with no substantial addition, the less you'll be perceived as an asshole and the more will get done.