Can anyone explain why Galio an anti mage tank has below to average MR?

I realize he gets a shield and is supposed to build MR, but shouldn't this be the one thing he's already ahead in? Like you build the extra MR so that mages do zero dmg to you instead of highly reduced. Like his power seems to be all over the place. He doesn't even get ap for mr like he used to so now he has to spend more money on ap items because he can't tank as well so he has to kill them first which just leads us to that broken version of galio and, and look we all don't want that.

All I'm saying is Galio needs some stat adjustment because anti mage shouldn't be a hope it should be his base existance.

PS: while you're at it can you make W do dmg to monsters so Galio jungle can be buffed plz and thank you.