Servers may be some of the issue, but the problem then is that a number of games, at least outside of MMOs, don't seem to give much of a choice on that. Presumably they're trying to connect to servers that should give a good experience, but... 🤷♀️
Regardless, the intent here isn't so much to troubleshoot networking issues, as it is to find games that may handle less reliable/rougher network situations decently, as much as is really possible anyway.