Why is cPanel optimization making my site so slow?

hey everyone, i'm pulling my hair out here. we just started rolling out some cPanel optimization techniques across our client sites, hoping to finally boost performance and reduce server load. you know, the usual stuff for better website performance.

but instead of things getting faster, everything feels slower, especially page load times and backend operations. it's like i accidentally hit the 'slow down everything' button. i'm really stuck here and honestly dont know what i broke. this is supposed to be part of our server management offering, and it's just not working.

• What are the most common reasons cPanel optimization attempts backfire and actually slow things down?
• Are there specific settings or modules i should double-check for conflicts or misconfigurations after making changes? im thinking like Apache modules, PHP handlers, or even database settings.
• Any quick diagnostic steps or tools within cPanel to pinpoint the real bottleneck? i've been staring at the resource usage but can't quite nail it down.

Thanks in advance!