I think you're confusing Wifi and cellular/mobile internet technologies.Wi-fi filter won't solve this issue, NRS needs to know that there 2 technology of wi-fi
a) The last gen Wi-fi which is 3G and whoever still uses 3G wifi shouldn't even be playing this game online because the spike on the tech are too big and not suitable for it
b) 4G wi-fi which is the current gen and while still has a considerable spike on a net code like MK11 it fits the 150 ping criteria, which i already confirmed you can go and play pretty well against other players up to 200ms ping treshold.
Or having a indentifier so we can tell who tha hell is use 3G network in 2020, 5G is on the way and its going to make a lot of things viable even online wireless, maybe we will even go global this time.
Last but not least, for the love of god, allow us to fucking mute players, some ppl are just too toxic and we are forced to sit there and listen to them.
Wifi are things like 802.11b/g/n/ac. 3G/4G/5G has nothing to do with Wifi -- that's the connection between your cellular provider and you. I sincerely hope that no one is using their cell phone tower internet to play Kombat League (although I wouldn't be surprised).
802.11ac, while technically being a last-generation technology, is plenty fast enough to play a game like MK11 just fine. But, it needs a couple of things: 1) The wireless receiver shouldn't be very far from the router. Like, the next room over, rather than all the way across the house. and 2) Since the 2.4 Ghz wireless band/frequency is pretty saturated with random gadgets and interference from neighboring Wifi gear, it should be on the 5ghz band at the very least, or a combination of both.
Most people aren't on AC though, especially as the built-in network card in the PS4 only supports g/n, for example.
Anyway, these are completely different standards.