@tatals Sorry, didn't mean to come across as obtuse

Guinea pigs remind of kittens in some ways. If you handle them right from birth going forward, they can be great cats. Don't handle them right, and well....
This is an unfortunate draw-back to getting pigs from others, as it's tough to know how they'll behave or how/if they were handled. If they already had a shaky temperament from birth, and are handled poorly or bullied enough that it alters them on top of the temperament, it might be a little more challenging going forward, and sometimes expectations need to be shifted to adjust.
One of my pigs "Amy" is overly vocal about being submissive with her sister "Griffinia", though she'll often stand up to her or they have little stand-offs where neither budge but both whine, followed by Griffinia eventually "rushing" her and Amy runs off, losing her coveted resting spot. It initially caused Amy to give the same submissive squeal to others in the cage if they got too close, and even me to some degree. So she gets extra petting (in-cage) w/o trying to pick her up. I'll mimic a boar (or sometimes a sow) and do a gentle "ear tug" a few times, pet her nose, maybe the chin if she allows it (they'll put their heads up high if they start liking chin rubs; I always say "want your chin rubbed" so they understand the intention over time; works really well with my boar Scottie too, rest don't overly care for chin rubs yet) but I avoid overwhelming her, and do it for 5-10 seconds then stop, or if she starts acting like she's going to move, stop. It's pretty cool though as she'll squint her eyes or completely close them with the ear tug thing now. But just from the bullying (or possibly a bad fight that wasn't witnessed) from the sister, it was enough to change her actions a bit.
It's taken time, but she's gotten more relaxed, doesn't whine as much when others get close (Griffinia is another story, they just don't like each other) and stays put w/o freaking out.