the whole flat webdesign is really a poor design and highly unprofessional.
as a web design professional who works with both in-house developers and big-dollar vendors, i'm going to have to disagree with you.
any chance this whole "flat design" thing is more about your personal preference, and what is easy for you to read?
I do not think so. The flat design is very much unreadable, wastes terrible amounts of web space, uses extremely limited real content, . It could be that most flat designers just do not do a very good job of it. We both know how some designers think that their job is to impress the web user community with all of the cool coding tricks they know rather than build a site that is easy to navigate and intuitive.
Many of the flat pages fall to a number of faults. One is that they are often coded a single huge run-on page rather than logically segregated into pages of unique content so to speak. I have seen some flat sites that are one continuous pages that scrolls on and on and just randomly changes from topic to topic. Other waste so much screen space that content which (properly designed) would fit onto one or at the most two screens, scrolls on forever and ever (see
http://www.cpanel.com a TERRIBLE design). On that page everything is so big and bulky with so little real content (not a lot of useless self advertising) that I would never even consider using their products. An even worse page is
http://www.sprint.com, I would fire any web designer who even suggested a page a poorly designed as that one. Not only does that page fall to much of the typical shortcomings of flat design, but the use of those horrid squares/tiles and the clashing colors make it difficult to look at let alone use.