So I've been trying to get to the point of woohoo with greg but each time he sees my sims he fights her, even if they are good freinds, wich then resolts in them dispising each other so I have to start over, is this normal or is my greg just bugged?
This is normal, especially if your Sim is a vampire or a werewolf. Sometimes he'll chat with non-Occult Sims.
I did have luck with sending over a werewolf whose spellcaster roomie gave him Potion of Forced Friendship first. He just befriended Greg, but Greg didn't attack him and was willing to chat.
As @xochiquetzl_xkvn say, it’s by design. Some simmers want challenges so the team allowed that you can wohoo Greg if you got his friendship/romance fast enough up (take photo, potions) but he will/can still attack your sim.
In his lore he always has a lost war with his fury. People with anger issues still attacks friends, without therapy help or a big self-discipline. I don’t think Greg want (or can) control his anger issue.
I have a sim who was actually engaged to him, with really high friendship/romance but you actually cannot marry Greg or woohoo him. But he did get sad when she hooked up with someone else. Never have I had more problems trying to get a Sim with an NPC than I have with this pack. At this point I’m making my own Greg,.
Greg is difficult by design but it's not impossible to woohoo or have a baby with him. Your sim (not Greg) has to do all the work communicating with him & eventually romancing him into bed, so make sure your sims needs are all met before engaging with him so you can keep persisting.
I got to become pregnant with Greg's baby by wohooing him as a vampire. Vampires have several traits to seduce other sims and if they are strong vampires (master vampire with vampiric charm and vampiric strength) then they can become alluring enough to seduce Greg and have a quickie with him in a bush. Never got to befriend him though. I guess you can't take those type of guys seriously for a happy marriage....
