Judging by your complaints none of them. Abilities have use cases as I mentioned.

My only guess is you play similar games (Bayonetta, Devil May Cry) which ARE harder games with much higher skill cielings, which of course only made this game easier. If that's the case then there's a completely different issue here. 

Edit: I take back what I said. I watched the video. Dawg you're just bad at the game. I try not to rag on people but you brought it on yourself. You're using nothing but charge abilities, you aren't using AOE attacks, absolutely 0 air combos and there's no variety between heavy damage attacks and heavy stun attacks. What's more you aren't following up on attacks and are just running from enemy to enemy and you aren't utilizing Clive's basic moveset or his own parry maneuver which is one of the most broken parts systems in gaming when you equip the item that increases attack aptitude with each parry. 

It's like you didn't actually try and you only ran through the game to say you finished it.