Ask HN: Why is OpenAI and ChatGPT design so bad?

From login ,UI, to ease of actually submitting a query, why is the OpenAI website so bad given it is the hottest startup on earth and ycombinator companies seem to prioritize quality design and UIs (such as ABNB). This company can hire the best designers on the planet and yet the page is horrid. Is this on purpoise bc demand is so extreme they are throttling with a horrid interface or what?