Friends that you had to let go.
Mine are mostly not what they say. But their actions. And some is substance abuse. I have a friend that could turn a wrench decent. But could never afford anything himself because of his problems. He's a drunk. And no matter how many times I tried to explain. "There is no such thing as a functional drunk." Especially with cars of higher performance. You're going to hurt someone. His drinking demon always won. He nolonger can help with any performance effort. The picture below is actually him doing a test and tune hit with my Duster. (The only pic I have on my phone. I was the photographer on this hit.) On a day that he managed not to be drunk. But today? There is no time he is sober. It's too bad. He has some skills. Just completely destroyed.
I like my beer too. But after car hours. He just couldn't understand that drag racing is NOT a drinking sport.