Left4Dead2 Visuals Multihack

Speaking of fps drops. I host my own local lobbies and i swear people complain about fps drops all the time. I too noticed them with previous versions, current one included, especially when hordes spawn. I.e when there are a lot of zombies around. I don't think huge fps drops are an acceptable trade off for anything really. No matter how good the improvement overall may be. No improvement feels worth the trouble if the game becomes unplayable because of heavy fps drops. Just my opinion. There should be ways to satisfy both sides of the coin. For people who would accept the fps drops and for those who wouldn't. Just saying.

But i am really curios, what options in particular would cause fps drops with current version and past working versions? I would assume chams are the culprit but i may be wrong. Just wanna know which options cause these fps drops cause they really impact the performance severely and for the worst no less.

Not sure about fps. Mine is fine

Some stuff like glow or draw distance or hitboxes options drop fps. Also dme chams are little heavy

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Also if your game is filled with workshop mods its a big factor also

Can you analyze my config.dat file and tell me what options that im currently using impact my fps? So i know what to keep and what to discard. Thanks!
PS: Also if you could take a look at this crash file? https://we.tl/t-QCFR9hkRGu 
Speaking of, what program do you use to read the crash file? I'd like to know so i could debug myself without having to burden you with this.