in RR's last 17 games
You are the one who doesn't understand stats. Ralf managed more games than Ole so why would I only see his last 17 games and not all matches. Is it not selective to consider the last 17 matches instead of Ralf's entire reign? Again I don't understand how a manager who managed more games and had a marginally better PPG was worse
Your 2nd sentence is irrelevant to the original context
It's only irrelevant if you do superficial analysis. There are a ton of factors affecting a manager's performance. If you want to ignore everything that happened at the club to suit your agenda I can't help you. I can explain things but not understand them for you.