What is wrong with my telescope? View through Cheshire, advice much appreciated

Hello !

I've been using a Skywatcher 200P for almost a year, reading and watching a lot of material online about collimation. I am afraid I have done more harm than good and I should have stuck more to the factory settings :(

I've taken this picture though my Cheshire. On one hand the donut of the primary mirror is aligned with the black dot of the Cheshire reflection and with the center of the Cheshire's cross. On the other hand, the secondary mirror is very far to be centered on the eyepiece holder. It's shifted a lot to the top and a bit to the right.

I am quite puzzled, I tried adjusting the spider vanes but it does not look to do anything and I am afraid to break them.

What are your views ?