Pyke has a strong early and mid, it's his job, the problem though comes when late game rolls around and Pyke's squishiness catches up to him, he pops incredibly fast, his damage becomes laughably low, with every support out-damaging him, and at this point the only things he remotely contributes is the ability to distract enemies, CC, and his ult, meaning he needs to rely on his team a lot at this point. That's Pyke's weakness, he's an anti-hypercarry, as long as you respect his early game power you'll be able to slaughter him when late game rolls around