Ekko is ruining league

There are many reason why I think Ekko is an unfair champion, but the ones that bother me the most in no specific order are the following:

The passive on his w gives bonus damage on a percentage basis for people below 30% health, and it can scale well above the flat 8% blade of the ruined king gives.. i saw someone at 12% bonus.. people build a whole item for a lesser powerful version of his passive

His ult basically ruins team fighting for two reasons

He can either completely escape an otherwise well-executed attack or gank (which I think is fair maybe because that's his whole thing)

But more likely, he'll just run in circles IN a team fight and when he gets low he'll activate it and blow up for 1000+ damage, because it has over a 1.0 AP scaling, so he hits everyone around him for a ton... and if that wasnt bad enough he gets healed for A TON of health. I find this ridiculous because Ekko players dont have to use meaningful decision making when ulting.. it's either the best defensive ability in the game or an extremely overpowered offensive nuke.

Not to mention he doesnt even have to plan it.. it's just always following him so at any point in time he could use it. I think the only way this ult could be fair is if it did no damage at all.. because it is an escape after all, and you had to activate it before going into a fight, because as it is the ability requires no skill or thought at all.

His shield, although not lasting very long scales way too well also.

And lastly, if you throw the stun field right in front of yourself before going into a fight, you stun your opponent without the potential of counterplay.

The most recent Ekko I spectated had 350 AP and was hitting the following

1000+ for his ult Stunning for 2.25 seconds Shield for 700+ He stuns, he slows, he heals, he has an escape, he has a dash, Botrk passive, his normal passive increases autos scaling with AP,

in my opinion riot must nerf Ekko or the game will be ruined.