Clarkson is horrendous, I'll give you that but Russell has held his own. Hibbert isn't helping either. If the man isn't in the paint, Hibert is useless on defense.
Breh, you were so impressed with Clarkson's intensity and will they you missed the holes he has (Way too reliant on physical gifts and has shoddy defensive reactions) but these are things that can be fixed.
Clarkson is a good piece, you just gonna have to develop him. He has that kind of intensity where he could be a perfect 6th man, at worst, and a lowkey all-star at best.
Same with Russell. These are a good pieces and Kobe's probably gonna be helping develop them after this year when he retires.
Y'all will be fine. You definitely need to look at hiring a coaching staff that specializes in development though and get rid of your coach.