Olshey certainly deserves at the least some credit for the Dame pick. He was the GM at the time. The GM job is to communicate and convince the owner of the best actions to take. Allowing Paul Allen and agreeing himself to go along with a prior recommendation is an action. If that is indeed the one Olshey took, he should get credit for that. Maybe others deserve a ton of credit for the Dame pick, that could be the case too. But saying Neil deserves no credit is incorrect.
I'm all for firing Neil, but I'm not going to unfairly blame, remove his accomplishments, or unfairly criticize him. There's plenty of justifiable criticisms against him.