You'll always get one dominent one and yes they're going through The terrible Teens.
What you can do is make everything Pig Neutral and bamboozle them (it doesn't take much
)
Move all their furniture round, give it all a good scrub - vinegar is good, it neutrelises smells, new boxes, new bedding. Cardboard box each with 2 doors (escapre route).
Big pile of hay.
Wash them, it works. It puts them into a mood with you so they forget about the mood with each other.
Our older boar raised his stepson from a tiny piglet (6 weeks) to a strapping great lardy boar , who of course tried to jump on him. He had a
look but used to tell him to Foxtrot Oscar and they sorted it.
There will be tussels. Boars don't naturally live in pairs , it is a set up that works if they have space to get out of each others way and there are loads of happy boar pairs about.
But in their natural state they'd have lots of wives (like my neutered boy , henpecked by his 2 wives and another 2 wives next door
)
We used to pick up the Dominent one first and put them back first to peruse the clean cage. Once they knew their status they were quite happy.
Its not just boars BTW, our GP7 pesters our GP8 (both sows) but theres no chewing or fighting.