5G has nothing to do with the problem you’ve described — a symptom of insufficient tower backhaul. It’s typical for 4G LTE operators to deploy a minuscule 100Mbit fiber connection per tower. We should be investing in 1Gbit backhaul of LTE.A, but that’s not a sexy message for consumer TV ads.
The farce of 5G is that it’s a pure marketing ploy. It’s not driven by technical need.