Was it necessary to say "of course it looks sooo ugly" before delivering your feedback? This sort of phrasing isn't constructive, and taints the rest of your message.
When I was younger, I thought it was enough that I was speaking the truth, even if I phrased things harshly. I'd think to myself "they should listen to what I have to say, because I'm correct. If they don't like how I phrased it, that's their problem." Unfortunately, humans aren't robots. If you're going to deliver harsh feedback, it's important to do it in a way where the other person is likely to accept the message you're trying to communicate. Otherwise, you may as well have not sent any message at all.
When I was younger, I thought it was enough that I was speaking the truth, even if I phrased things harshly. I'd think to myself "they should listen to what I have to say, because I'm correct. If they don't like how I phrased it, that's their problem." Unfortunately, humans aren't robots. If you're going to deliver harsh feedback, it's important to do it in a way where the other person is likely to accept the message you're trying to communicate. Otherwise, you may as well have not sent any message at all.