Inb4 the downvotes im just gonna call this out A champion that can outsustain any lane in the game just by last hitting, harasses you for free by last hitting and has true damage on top of an aoe knockup and 2 second silence? Oh yeah, forgot to mention hes one of the tankiest champs in the game?
Wheres the counterplay to this?
Low mobility+AoE spells=>pushing lane=>susceptible to gank Delayed knock ups High mama costs
It sure looks like 
is OP
Slow as hell, the creep block is unreal, his (extremely mana expensive) skillshots are hard to hit, if he dies he needs to wait at minimum 1:30 to get his tankiness back up, if he feasted immediately, and if he feasts you it delays him even more.
The reason Cho sees bans nowadays is not top lane Cho nor jungle Cho, which are both reasonably powerful.
No, the reason Cho sees bans lies in the mid lane, where he is one of the more powerful picks currently. His main power there lies in him countering assassins, between his high health pool, silence and strong counterburst if you move in onto him. Also, he works decently against poke-based champions, due to his sustain.
However, there are quite a few things you can use against Cho'Gath, once you learn about his downsides:
1st, and most importantly: Stay mobile. Dodge the Ruptures. They hurt. In more than one way.
2nd, and this is the same more top and mid Cho: Any Cho lane is more like a farm lane than a kill lane. If you have the chance, use a champion that scales well with lots of farm, like Karthus (just don't channel Requiem in plain sight, please) or Anivia (bring MS quints and 3 points in the utility MS). Or use a champion that has equal or even higher sustain than Cho, i.e. Morgana (also, doesn't get as screwed by Rupture). Third possibility is a tank-buster mage, like Malzahar (don't use ult if Rupture is below you) or Brand.
3rd possibilty is to use a non-traditional mid laner. Like Tryndamere.
4th, don't try to kill him alone.
5th: Don't play 
.
Lost lane to a Cho'gath as Jax; a champion with poor early game and little harass. Cho'gath builds tanky items with some AP damage (Rod of Ages, Frozen Heart and Zonyas) Complains that they can't burst down a tank
There's a lot of counterplay to it. You can dodge his Q relatively easily, and his ultimate is a fair amount of his damage. He pushes the wave, and doesn't have any engage without his Q hitting you, while having no mobility to escape from a successful gank or to be forgiving of poor positioning. To be fair, though, his harass with his W, while short ranged, can be annoying as hell to play against.
In addition to what other people have said, you stated that he harrasses you via alst hitting, but you neglected to mention that he also pushes down the lane by doing so, since the spikes don't discriminate.
He can be strong if he hits what he needs to hit, but otherwise won't do that much, you're just angry he nom'd you in a game or something. Or what, are you one of these godlike players who claim to be able to land 100% of his ruptures?
Noone mentioned :O He Actually Has To Stop Every Single Time He Casts An Ability.
building health to counter true damage
you can dodge the knockup
you can stay out of range of the silence if you're a caster and kite him
and you can build 
to counter his health stacking.
Inb4 the downvotes im just gonna call this out A champion that can outsustain any lane in the game just by last hitting, harasses you for free by last hitting and has true damage on top of an aoe knockup and 2 second silence? Oh yeah, forgot to mention hes one of the tankiest champs in the game?
Wheres the counterplay to this?
He is slow as fk...
70% ap ratio on true dmg, i'm out.
Maybe a nerf, but a rework? No no.
His kit is quite healthy, actually, possessing good strength and exploitable weaknesses.
Zero mobility, all reliable spells are short-range, only long-range spell is extremely telegraphed.
Is he strong? Yes, always has been. But he's not short of counterplay, particularly early in the game before he gets tanky.
