I havent seen like any dota games to join. I play in the USA, it was never this empty as it was yesterday and today. Before these past couple days there was usually a game or 2 at all times, now there's 1 or 2 games to join for the entire day. What happened?

try out russian sector

All users like yesterday they're playing every day, if you are not playing well may be the users who is hosting game(DotA) they are banning you to play with their hosting(BOT), I hope it's that but no worries we've lot of games in lobby you can find it easily