Recently we've moved to nginx with redis and since then the website crushes very often plus when is not doing that is loading very slow. We need to optimize and reinstall other version of nginx if posible. Also the mysql process is sometimes using CPU over 700%, you can see printscreen attached.
The platform we are using is Magento 2.3.3.
We need to make some adjustments to the whm configurations as some unwanted software were installed. The OS is having lots of errors in the booting screen, didn't had these before the previous work.
We need an experienced developer with work in similar fields in the past.