Hi, I’m new here. I need help. Where I can report players?
Report player’s doing what? Private server or official? More information provides better response
If you are on an official server, then unfortunately reporting players won’t get you very far, it seems funcom don’t take action against misbehaving players, instead they try to patch and implement systems to stop them being able to behave is said way. However you can imagine how well that works… They don’t actually punish players at all. You are much better off on a private server with an active admin, they will actually take action on your behalf and help where they can, if you are on a private server usually they will have a discord where you can report players and provide evidence of the offending behavior.
This is why I play on and recommend private servers over official. On official there are no admins to hear you scream 
That they play aggressively, I can understand, because it is a pvp server, but they use bugs for rallying and their protection. Duplicate bubbles, building very close to the bases of others. Writes a message with threats.
Do you have proof of bubble duplication? Building very close isn’t rules violation
Putting notes up isn’t against the rules unless they were putting up things that where in violation of the terms of service.
Don’t post what they said but what type of notes are they leaving?