Why have champions been started to be waggish?

I mean, I'm not talking about their taunts or jokes. These specific quotes are supposed to be like this. But why do generic, movement and attack quotes are jesting and less serious, even for characters like Rhaast? Rhaast is a bloodthristy war machine that brings nothing but pain and death. And he feels so waggish, I don't get terrified by his quotes.

Our last serious character is .

Let's look at last champions.

(half case. I'm talking about Rhaast more here, Kayn is serious but edy tho)

And now Ornn.

I mean, It is started to be annoying. I don't know.

I just don't want Evelynn to be another waggish, jesting character. I don't want another ''Ugh, you are annoying me, just die please" like thinking character even when they're evil as shit.

Mordekaiser is another champion that should be avoided from this. I would never ever want Mordekaiser as Rhaast. EVER.

Urgot is well made tho. He is a character that feels terrifying. Is it a shame or a success for designing a human character being far more terrifying than a darkin? Not sure.