The phrase "cluttered look" means that something appears messy, disorganized, or full of too many things, making it hard to find or focus on what you want. Full definition
What did come as a moderate surprise was the cabin's less cluttered look with all of its buttons and equipment neatly arranged and designed without any excess of style. (topspeed.com)
Most of my research online has taken me to cluttered looking websites, but yours is just lovely! (bodyunburdened.com)
Although I have a lot of colors going on in this outfit, they are all a soft, warm tone so I don't think it's too much or too cluttered looking. (stylethislife.com)