Are there 128-tic Valve servers in CS:GO

If you say that you do not find any server and after increasing your maximum ping, it is surely your internet connection.

Reason behind that is that, that the most players have it on 150ms. So the most of the players find a server. You dont find one because you need to much time for a ping.

So you should stop downloads or stop listeng to music that is streaming in the background like youtube.

You should set the maximum ping to 150ms otherwise the chance is higher to find a empty server (with Bots).

Yes, that is the only way. You can also create a group of friends before you do so and enter the game with your friends on your team and go on a pub stomp. But matchmaking is the only way to enter a competitive match.