His ult does 1k AOE damage to you when you can't do anything back to him. His Q waveclears really fast, has a low cooldown and mid-late game it can easily do 400+ damage per cast. His W heals for so much that it's almost like whoever he w's is invincible. If you try to run from him he just slows you and speeds himself up WHILE doing damage to you.
I mean yes, you just described a champion's kit. Lissandra has an ult that makes her invlnerable and damages you at the same time. Or makes you unable to do anything and take damage. Kayle has an ability that slows you, speeds her up, while she does damage to you, and she has an ult that protects her from all damage while she damages you. Poppy also has an ability that speeds her up, can CC you, and can make herself invulnerable while she damages you.
Galio isn't the first, last, or even a problem honestly. His Q is really hard to land on people, and that's essentially most of his damage.
He is also one of the most mana hungry champs in the game, no MR item gives enough for him to build appreciable damage , his ult can be invalidated completely by building Mercs, and his skills are all on extremely high cooldowns. Melee auto attacking makes sticking to people nigh impossible and low mobility gives you zero engage capabilities on a cc tank.
Lol, galios ult should never be doing 1k damage to you, buy magic resist. Also plenty of champs can interrupt it. Udyr bear stance, galio ult, instant cancel. Same thing if garen Q's or Leona Q's etc etc. Merc treads were already mentioned as tenacity is a big reason galio is never played. It reduces the duration of his ult(thus the damage) the other would be mobility. His e's ms buff only works while you are in that narrow straight line. Turn hard left or hard right. His q scales OK .6 and has good base damage. It is slow and costs a ton of mana. Learn to dodge them and he will become oom in lane. Overall galio is a weak pick who has very simple counterplay.
