And that's because she isn't OP or something , it's called circle jerking because they hate Ahri mains
She is a balanced champion , that's all
and not only you struggle on csing with her , generally csing with her is hard in early , her wave clear in early makes her lose of a lot of cs in early and you really need to be experienced to not to miss cs on her , but at level 9 with some ap items , her Q can kill caster minions , to clear a wave , auto attack the each melee minions twice then Q to get the whole wave and w to clean the rest
Her Q Heal passive , you really shouldn't rely on it much in early before your first recall , Ahri is the number 1 Mid Laner " with Fizz " she runs out of mana very fast , so you have to be careful while using your mana , after your first recall , you can use Heal passive from time to time " it also drains mana to get the stacks , when your Q orb turns green , it means the Heal passive is ready , send your Q to a whole minion wave and if possible hit an enemy with it to get the highest amount of heals you can get
While she is a good pick in this meta to not to feed , she is still no way near of being strong as the picks you mentioned , so you will have to suffer it sadly
Ahri isa burst mage " not an assassin " she can't 100-0 anyone in early ,at level 6 , you need to abuse the free damage in the game ,at level 6 you need at least
to do this , engage with Ult and hit your charm and full kit and ignite with basic attacks , ignite is 20% of the enemy's HP and Electrocute is 10% HP with a lot of basic attacks , and maybe a second q or w to kill them
Against champions that got shields in their kit like Lux or Ori , you need to poke them down before going in , and against champions that took Barrier , you also have to poke them down , and again Orianna and Lux who took barrier? you have to poke them till they are 60 or 70% HP then go in , make sure yo land your charm , without it you can't do much
and remember as Electrocute Ahri ,you can make a good poke in lane , it's pretty risky sometimes but it does good damage , 2 basic attacks and Q to apply electrocute , you can use W instead of a second basic attack but honestly it's a waste of mana , and preferable not to use W that much unless the target is charmed because in her latest rework , after hitting charm , Enemies take extra 20% damage from all her abilities