"If you cannot afford an attorney, one will be appointed for you."
Craft trumped-up charges against someone you want to throw behind bars indefinitely, and give them an incompetent lawyer that works for the State (deliberately incompetent or not, doesn't matter), and just from the lawyer selection alone, you can use this Supreme Court ruling to fuck them completely. You could do it to anyone.
I think you haven't thought about the natural consequences of this ruling. Even putting aside how fascists would chomp at the bit over this, even on a personal, petty level it is obscenely dangerous. You could have a bigoted lawyer that throws your case on purpose, for example.
Can't be deliberately incompetent. That's an oxymoron.