Speaking of Ron, Ron is funny- he makes jokes! There were a few fics I read where he was a creepy rapist, and his friends knew it too! You could say, "This criminal was so ruthless that he destroyed buildings and murdered families for fun, and nobody really knew why.
Other please tell me in the comments so I can help. I tucked that away and have never made that mistake again. If your protagonist chose to run away from the conflict, what For The Music Lovers I recommend the video above for those who like to listen to music while they write.
Don't worry if they find loads of mistakes, because A: they're helping you to improve your story and B: you can keep that information stored so as you don't make that mistake again. You wanna remember to always be in connection with your characters feelings, which means you might make the character do something that you would never do.
However, description, padding and back story are the key. It usually just involves adding in details like who is speaking when or what time of day it is etc. He's awkward. To describe something like an urban style city, you don't have to list the particles in the concrete sidewalk but you could say that the cracks in the newly developed walkway made it a bit of a struggle for some people to walk down it.
Keep looking to better your craft, and people notice and appreciate it.