Not every sentence will be beautiful. Not every sentence will be perfect. It's easy to get wrapped up in making everything phenomenal, and depending on who you've got critiquing your writing, you may find that you're judged on wild standards. Even in great novels you're bound to encounter some lines that are just 'meh' or 'okay' or maybe even bad.

No story will ever be perfect. Writing involves such freedom that what works for someone isn't going to work for everyone. Write the best story you can, but don't forget that every sentence can't—and won't—win you fame and fortune.

Sometimes they aren't very beautiful; many times they won't get you an award or be remembered long by your reader. Don't stress too much over it. Sometimes you just need a "Tasha threw up" or a "Its claws sank deep into Martin's thigh." Sometimes you need a little bit of glue to hold up all that glitter.

Basic isn't always bad.