I assure you, you are not telling us neckbeards anything revolutionary.
Here's the issue: We're playing as close to ideal as can reasonably be expected and nobody is within shouting distance of beating the enrage. Not one guild who logged on when servers went up has been able to complete this fight, and it's because the enrage timer is too short.
We're not missing mechanics, and we're squeezing as much dps out of our raiders as possible. It isn't enough because the fight is mathematically impossible as it exists right now.