“This sucks!” Isn’t helpful. It might be your gut reaction, and it might even be right. But it doesn’t point the way to improvement, and it almost unfailingly makes people get defensive.
(Side note: telling them not to get defensive almost always produces the exact opposite effect.)
Ask questions instead:
- “What was the thinking behind this word choice?”
- “How do you think the user will interact once they reach this page?”
- “What are you trying to convey with this color scheme?”
Questions start a process of improvement. Judgement, valid or not, prevents it.