After i spawn something and then try to spawn something else with hotkeys it takes about 2 seconds before i can spawn again

do you click the key and nothing happens? Or does it look like it's happening and there's a delay between when it should spawn and it does?

if it's the former, it may be settings for your keyboard, especially if you're on a laptop. When i first got this laptop it's keyboard software was set to ignore button presses of the same button if they were within 2 seconds of eachother. I think it's to prevent mis clicks or slipped fingers hitting the wrong keys, but it delayed my shamming hugely before i realised that's what it was. you can go to your keyboard settings and change it to be no delay if that's the case.

when im in survivor and i click 2 i can shoot normally , but when i click 2 again the cannons pops up , but i have to wait a while to actually spawn it. and i just checked my keyboard settings and i set everything to fast , but still its the same problem

are you on a laptop? if so it's well worth checking your mousepad/touchpad settings too. They often come by default with the same delays cos a lot of people lean on them when typing and don't want those clicks to count