is there any ACTUAL purpose to giving Garen such absurd damage?

with just in the early game he did stupid amounts to me as malphite at 197 armor, I think the problem here is letting his kit have a free black cleaver that can stack with the actual black cleaver. (their stacking goes separate but add up into a combined total)

but why did they give him such a stupid amount of damage? this just seems unfair when he also has a way to reduce damage, shake off slows and just heals fucking stupid amounts just by avoiding combat for a few moments, I get he's meant to be for beginners but geez, he's almost as bad as , for beginners but ridiculously strong