These champs aren't braindead. And pulling the rank card doesn't make you look smarter.
The invilnerbility is simple to work around when you put your mind to it.
Illaoi's ult can be solved by you walking out of her ult circle.
Kindred ? Well jump in there with her and whittle everybody down, while Kindred hopes your team doesn't have better burst than hers, otherwise you win every time. A displacement effect to knock her or her team out of her circle is a pretty neat trick too.
Bard? A giant Zhonyas. Be glad they can't hurt you while your in it and it gives your cooldowns time to come back on.
Taric's ult needs timing and skill to pull off. If you see the circles of fabulous show up, disengage so he wastes it or burst his team down before it activates.
Ekko is just one person. Don't stand near his clone and you'll be fine.
Just because you don't care for a kit, doesn't mean its a bad kit or Riot needs to listen to you alone and delete the champs.
These champs are not a joke, just learn how to play around them or keep on complaining and lose to them everytime.