There’s 4 factors at play here. Different hardware, connection type, location, and cross play. For the different hardware it’s gonna come down to the speed of the components usually the storage and cpu because some people are on old gen consoles with HDD even some people on pc have HDDs and you will feel it. For connection some people live in rural areas with no fiber or even copper so they have to rely on satellite or WiFi hotspots which drastically impacts the experience creating that McDonalds WiFi situation. The location factor doesn’t really matter too much these days because I play with people all over the world and don’t really experience too much latency but it’s still something to account for as the longer a signal travels the more latency it will have. Cross play for Xbox and pc doesn’t really have to many issues because they’re practically the same platform with slightly different os versions. PlayStation though is where the latency can be felt because of the extra conversion layers the connection has to jump through adding latency. Hopefully this helps just a quick summary. There’s way more to it but that gets into technical details and a few people already made a few great posts explaining that.