Wordpress WEB site grew huge, how to fix it?

How doesn't it work? I just run a cron-job for renewal. I remember there was a problem with it, so I had to do it manually for a while, but currently the cron-job just runs the basic bash-script to update / renew the sertificate. The update process only updates if the sertificate is running out, so I run the job once a day (could do it more frequent, but it's not that important).