You're basically saying you're bad at playing mechanics correctly but with Noct and slapping GCD shields on yourself you can still survive it, so Noct must be really, really good.
I hope you're aware just how much that disqualifies you.

You have yet to bring up a single valid point why Noct is so much better.
Not to mention it has been stated multiple times that Noct is neither bad nor useless but that experienced healers will almost always chose Diurnal because it is stronger if someone can play decently. You're free to play in any Sect you prefer; you could even play without a Sect at all in casual content. Most people probably wouldn't even notice.