10s bit long to remove them particles, also spawning all of those point hurts.. Point hurt is very unreliable, why not just use sdkhooks, you have the include but it does not look like you are using it.
Also, dont use removeedict, use acceptentityinput(entity, "kill") unless you absolutely need it removed on that frame. You should also use ent refs for killing the entities in timers, its faster and safer.
In your client loop, you dont need isvalidedict and isclientconnected, if they have an entity, they are already in game, and are also connected. You can just use isclientingame.
Cvar changes should be made in onconfigsexecuted also
as they will reset or change at some point most likely.
May be a good idea to check if the weapon returned from tf2items is valid before equipping it, though it almost always will be.
Runcmd fires 33-66 times a second generaly, so try to do as little as possible in there. If they arn't pushng buttons, you dont need to do anything, and thus not declare any vars
You chck if on ground, then if nit in ground, you can just do else, because bith cannot be true.
Ongameframe yu can do your decl outside the loop, as its gonna get used a lot, this fires 66 times a second
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