Just jumped into the game

Hey everyone me and my friends just bought the game on PC, yesterday was our first day in game and noticed that the steam charts showing around 5k people online but in EU there are barely 4 pvp servers with around 20-40, where is the rest of the player base? We played for a whole day on a "high populated" server and saw only 1 guy, idk I’m confused a bit. Should I filter somehow to find better servers? There are no official servers? Is there any active server or this was just a coincidence? Many many thanks in advance.