Need new Multiplayer Shooters

[Trexller]

So im into Rainbow Six: Siege and CS:GO

now im bored.

Steam's game and player statistics seems super biased.

Are there any other multiplayer shooters that I may not be aware of or google won't show results for?

Please exclude anything cartoony or for kids like fortnite, payday, overwatch, and any games with dead populations.

Looking for realistic (as much games can be anyway)