DPS display could easily be solved with a system already in game.

[Massterchef]

Since I havn't beaten the final turn must mean I suck.

More like, since you haven't attempted the final turn when it was relevant content, that would mean you have no perspective on the importance of a parser and what raiding entails.

Why? Because you attempt and clear the content when you over-gear it. You haven't experienced not being able to hit a DPS check because echo, soldiery/poetic gear, and nerfs make the content child's play in comparison to what it was at patch. That's not to say you're a bad player but clearly you have no perspective on what raiding requires nor the importance of a parser.