CASSIOPEA

{quoted}

She can just force you out of lane by first level and deny all your dashing abilities, dealing a lot of damage while also sustaining herself.

Her E which grounds you, has a minimal casting range and you can still use dashing abilities like .5 seconds after it hits. Ha, force you out of lane? Then you really did something wrong. Her main damage is from twin fangs which uses up an extreme amount of mana. At level 4 I doubt she can 100-0 anyone that isn't afk due to her mana issues. If she takes her Q first just don't let it hit you, dodge it like any other skillshot like Karthus Q or Syndra Q. Sustaining? It's like 20 health back when attacking with twin fang on poisoned targets, so you get the mana cost from Q + spamming twin fang using a bunch more mana - that has to be 100 mana just for 20-30 health. Don't complain just because you lost to a good cassiopeia. She's a hyper carry, a bad early game because of her mana. Take advantage of that.