(By the way, you don't seem to have noticed that, although I said I was going to take a bit of a break, I didn't... Yep, I just couldn't stay away.)
Because you have been both child and teenager, you are much more interested in them than they are in you. Therefore, where adults appear in your story, do not bother to include their emotions, desires or crises. Your readers do not care. They care only as far as adult actions impinge on the characters.So, you can show adults doing things and behaving in annoying, reprehensible, or even, if you must, admirable, ways. But you must not get into the minds of the necessarily minor adult characters or begin to see the world through any adult's eyes. And if there is to be any explanation of the bad or silly behaviour of your adults, it must be seen or explained through relentlessly child / teenage eyes.
Don't forget this: you are nothing in a book for children. You just get in the way.