Hello buddy ! I'm here to give you some suggestions and some reasons why you're having some lag spikes. First of all, WIFI sucks when it comes to gaming, lot of packet loss, jitter etc, if i were you, i'd go and use an ethernet cable if you have one. If not, second option would be a WIFI amplifier, amplifiers help the WIFI to spread more, which means having a better and stronger signal, and the last ressort, it'll be using HASTE for example, a software that kinda helps you in getting rid of some lag spikes. Anyways, the 2 first options are the best dude