They don't give you the most relevant or important information first. Many users would rather leave the Web site and go use Google to do a search than use the site's search function. I'm appalled in general at the content sites on the Web. It's generally print content recycled for the Web. The best Web sites are written purely for online, but that doesn't make them all that good.
Corporate content is even worse.
On most pages, it's hard to figure out whether they're selling tractors or high-end stereo equipment because the descriptions are so vague. You make it sound hopeless. If you have a combination of luck and skill, you'll eventually arrive at the right page. Just the facts, please. Give me the answers.