Perhaps instead of being rude to him, maybe you can take the same amount of time and energy and give him a couple tips. Unless of course your server admin skills are lacking.
It is quite possibly a cpanel problem, did you think of that?
As for myself, I don't really have any tips for him because I am also looking for tips to help me lower my server load. Although not as extreme as his. And even though it may not be a cpanel problem, this is still a good place to look about anything to do with a server and how to run it.
Think about that the next time you have a question about something and everyone is rude to you.