Why couldn’t I find a single decent dev tool to help me vibe-code a website?

I’ve tried more than 10 AI website builders—from well-known platforms to startups, and from free tools to paid services—but I always end up battling endless bugs. They seem great at building an MVP, but not a genuinely polished website. Sometimes, the AI agent doesn’t even understand what I’m asking it to do. People might say my prompting skills are the problem, but when I give the exact same instructions to ChatGPT or Claude, they understand them perfectly. Am I missing something? Has anyone found a tool that actually works well for vibe coding a polished website? Someone, please help...