Hello
I did all what you said to me
I deactivated all plug-in and i make the settings for wp rocket as well
but the first thing no thing changes about my site speed
the second thing I know from the beginning the problem with xstore theme
the third thing how I use my wordpress site without using any plug in
there is some plug in is so important to use it
but I stop all of this but no thing changes because the problem is with theme