optimization – PageSpeed: desktop 96/100, mobile 36/100

There is a difference of 66 in the PageSpeed ​​results of my websites, for https://ppni.ie

I am using Cloudflare, Autoptimize and W3 Total Cache. I can not get the phone above 40 for my life, any ideas?

Many points to fix it are technical and are beyond my control (I think related to the server), as
& # 39; Minimize the work of the main thread & # 39;