Page-speed (ClanWars?)

Hi!
I am looking into decreasing my load-time for my site (it’s way too slow right now),
but I’ve run into some problems.

First of all, there is alot of JS-script loading in (quite a few from ClanWars).

2 Questions:

1. How do I disable ClanWars? I found a thread where removing it from functions + deleting the folder was recommended, but that gives me a ERROR500 on the site 🙁
2. Does anyone else have any tips on how to speed up the site using this theme?

My URL is https://www.prima-esport.se (the start screen is slow – picking organisation is even worse).