Why is everybody complaining about Lethality?

Lethality itself is actually really weak compared to old armor pen. Its basically nerfed armor pen that only works on champions and needs your target to be lvl 18 so you can get the full effectiveness out of it.

Problem is the items that give lethality are really strong.

Take for example: You get a spellshield, a ton of AD, armor pen, magic resist and move speed all rolled into one item.

I guess people want to believe there is something wrong with Lethality, and not the items themselves.

People would be calling Mpen broken if all of a sudden Riot nerfed Mpen so it worked like lethality but then added a few more Mpen items to the game like:

Rune of Day +15 Mpen 100 AP 30 Armor +5% movespeed active - heavy shield against physical damage that lasts 10 seconds (shield can be popped through physical damage) on a 30 second cd