Server starts lagging with 10+ players

Hey there.
I have an urgent request for help.
I don’t know why but my server seems to be laggy whit only 10 players on it and i don’t know why.
It works fine with < 9 players but as soon as players really start joining the server you can’t do anything without lagging
My Team and i have tried everything but nothink works.
I’ll list you some specs and my addons down below.

The Server:
The server is being hosted by Bungeecloud (It’s a vServer not a Game Server)
OS = Debian 8 x86_64 Minimal
Bandwith = 32 TB
Memory = 12 GB
CPU = 4x 3.6 GHz

The Server settings:
net_maxfilesize “33”
decalfrequency “10”

sv_minrate 0
sv_maxrate 0
sv_minupdaterate 10
sv_maxupdaterate 33
sv_mincmdrate 0
sv_maxcmdrate 33

fps_max 120

The Collection we use:

Scriptfodder Addons we use:
About 46 (If you want a List just tell me ^^

I had all this running on another server before with the same specs, addons and setting and it worked fine
The Server started out as a small projekt but became something like a SeriousRP server (that is why we use so many addons)

I hope that you guys can help me.

It might just have something to do with the fact you have 105 Workshop items, and 46+ Scriptfodder addons.

You seriously need to cut down on some of those addons, really limit the server with what it NEEDS, not just everything.

Remove fps_max, it only works clientside
do net_graph 4 in console and get screengrabs of 9 players and then 10 players