Angela74I have a few trouble shooting questions that may help resolve the issue.
1. Do you live in a house, condo or apartment and what is the square footage?
2. Have you analyzed the network congestion using an app like WiFi Analyzer for Android or something similar for Apple?
3. Are you using service provider equipment or your own modem and router? And if its your equipment are you savvy enough to make settings changes that improve performance, DNS and WiFi channel changes?
Regardless of the type of home, its not at all unusual for network congestion to cause problems. The simple remedy is identifying which channels are the most congested and changing to one that isn't. FYI, the 2.4 band is both slower and has better range but also has huge channel overlap. The 5 gHz band is faster but lacks the range of 2.4 though the best way to mitigate it is by knowing about the congestion.