Notes:

I don't hate Metroidvania and have been playing them recently. But they got stale after playing it multiple times, and it's formula also got stale after each installments, especially if the installation is quite similar to each other like Dawn of Sorrow and Portrait of Ruin
The difficulty can be pretty something, like how most of the games are pretty easy like Symphony of the Night and Aria of Sorrow but when they decided to go difficult it goes far as people expected, borderline unfair like Circle of Moon.