What's so extremely terrible about the user experience? As a regular user, I can't think of anything that would've annoyed me, beyond sending official emails t

What's so extremely terrible about the user experience? As a regular user, I can't think of anything that would've annoyed me, beyond sending official emails that look like phishing emails, and then support not even being able to always distinguish whether it's a valid email or not. Other than that, I've added a credit card, can press the pay with paypal button, login and pay for my goods. Nothing to complain in this loop really, so I'm curious what your perspective is.