Yeah, I've not had to counter that team myself cause I use revan and their tenacity prevents it from being a problem. I have a rock. I know the feeling tho because before revan I was running JTR and traya teams felt the exact same to me. I might get a chance to go once, but then they'd stomp me before I could do much. And that was 100% of the time, not "every once in awhile".
The anger at this team seems to be because it uses an old meta leader (zFinn) and a new meta legendary (3p0) to make Finn actually work reliably. Along with a raid only toon (Han) and another legendary (chewie) to beat teams.
So you have 2 new legendaries, a raid only toon, and I'm assuming CLS, a hero journey toon.
2 legendaries, a journey, a raid toon, and an old meta leader. That should be a pretty rough team! I'd say one thing they should change is not allow hans shoot first to apply expose and it would fix the whole issue in PvP