✍️ In a Football Club structure where the Sporting Director makes decisions for the head coach, I can't really blame the coach.
You blame the coach when they are in control of the club like Arteta and Pep. If the coach's request gets overturned, why blame him when things don't work. Just like Maresca wanted a CB and told no, and they it became a major issue the affected our performance. Would you blame Maresca?
For me, I believe every coach has a good future and idea but needs a club that will support and bring it to life. If Edu didn't support Arteta, he won't last long enough to see his team at the top and probably won't get another job. I remember Klopp's first two seasons at Liverpool or Pep's first season at City, they had the back of their clubs to overhaul and rebuild.
This is key point, when you hire a coach, you already know his strengths and weaknesses, because you did your homework on him before hiring him. There is no such thing as a perfect manager, everyone of them needs the support of the club to be successful. It's as simple as that.
If you hire a manager and feel he's for the future, then back him, get him the players, the support, listen to him, make him feel comfortable and feel the trust.
In the Premier League, the sporting directors are over protected. They control everything in the background, make decisions for the coach and let the coaches feel the wrath of the fans when things aren't going well. They need to feel the heat too.
If you feel that coaches are the problem at Chelsea, you're either emotionally lost or can't put your head in the right place to think logically. I will blame coaches at Chelsea when they are placed above the SDs and have the final say on key decisions. Until then, there isn't much they can do other than coach. We can only pray they get along with the SDs to be able to get the needed support to be successful.
In my opinion, our SDs need to sit up, back the head coach and actually build a team that will be competitive. Do I think Liam Rosenior is a poor choice? No. But he's stubborn. He's one of those coach that goes by "my way or no other way". While he was allowed to take 4-5 months to build coach squad to play his football and get results, he won't have that time at Chelsea.
If the SDs who know this fail to provide him the players he will require in the summer and hang him dry, he will fail next season and I hope he does not get the blame alone.
Maybe, then it will be time to review the SDs and their activities so far.