hosting automation system

I got hosting from Hostinger, the cache plug-in is set up perfectly, the database is cleared and optimized, but still this problem persists, I talked to support and changed the server, but it didn't improve.

Hello, as a provider i like whmcs a lot and i dont have experience with any other automation system, I would like to ask the question about what do you think as a customer Is WHMCS Best option? And what do you think as hosting provider? Is there any better alternative to WHMCS?