Noob Question

So basically I’ve been getting ready for ranked and prepping a pool of champs I can play mid, Galio seemed fine enough so I tried him a few times.

But I noticed early on he felt really weak, I kept getting badly outtraded early and dying a bunch, which in my mind kind of made sense due to his ability scalings.

Funnily enough, I’ve noticed with my past few games that my damage seems to not be that bad, even bullying some champs from csing.

I’m not sure if he suddenly got buffed overnight or somethings changed, but I’m actually somewhat of a threat mid.

From my understanding,

Q = 70ish % ap
W = Shield - Low ap
E = Stun - Low ap

So where is this damage coming from, especially with my first build most games being hollow radiance (no ap)?

Any help is much appreciated