In my experience, you either have good design taste or you don’t. Some folks are born with a natural eye- they know what looks good and have an intuitive sense of what goes where, what colors go together, and what prints match. Sure, you can learn, but some people have a natural knack that you can never quite match. That’s why rich people hire interior designers. Just because you have money doesn’t mean you know how to spend it. I mean, think of all the ugly mansions you’ve seen pictures of. If I have to see another billionaire’s stark white, empty mansion, I’m gonna go buck wild.
Interior designers are professional taste-havers (not to mention, skilled in other areas AKA knowing where to buy stuff and what the heck a backsplash is). On the other hand, some people or helpless. Or just suffered from some careless errors. That’s what happened in these design fails, hand-picked to inspire you.