McLellan and Chia were both probably close to the worst possible people you could have for GM and Coach with Pulju. Chia as a pushover is helping nurture a feeling of entitlement in Pulju and his agent at one level, and at the coaching level you have this guy that tolerates no entitlement, and you may as well take a crap on the team logo if you display it at all.
If Pulju was actually a really good player like we hoped, he would have done OK still. Actual elite players find ways to contribute and make themselves indispensable. The coach has no choice but to play you if he wants to keep his job. But, if you end up like a Yak, or how Pulju played, and you're in this middle area where people know you have all these tools but you can't put it together, you're vulnerable. And if you top that off by acting entitled with a guy like McLellan? You are quickly downgraded to a piece of trash. You're barely going to get any opportunity to dig yourself out of the hole you're in.
McLellan actually did find a mentor for Pulju in Strome, and he was looking like he was going to leave that alone. But back we go to Chia with one of his crappiest trades as the Oilers GM. Just so horrible in so many ways all the way through.