Hopefully this reply is perceived as constructive. Feel free to copy paste it on similar posts.
What you're experiencing is [b] "Loose" Skill Based MatchMaking [/b]. This means you can match players significantly higher and lower than your skill bracket.
Since Guardian Games requires 6 of the same class, I'd imagine the MatchMaking search would take too long to fill a match if similar skill is also factored in. Obviously there will be blowouts. If I had to guess, I'd say it's more likely that higher skill players gravitate to playing hunter, which increases the liklihood that you have lower skill teammates when you play warlock or titan.
I do not believe that Warlocks or Titans have weaker 6's PvP builds than hunter. It's just more rare to find teammates that understand how to pilot those builds with high skill.
I hope that y'all continue to play PvP, as the highs can outweigh the lows. I strongly advise lower skill players to queue the normal control playlist, or the competitive playlist.
Cam, in general I agree that Locks are mostly fine in PvP, but current meta has just become not enjoyable for non-hunters and needs tuning.
I also think us Warlocks need some melee love in both PvP and PvE. With few exceptions like Necrotics, we lack options and interactions in that department and for example the uncharged warlock melee is one of the most worthless and unexciting things in the game. I also wouldn't mind Weavewalk/Phoenix Dive alternatives to come to Arc, Void and Stasis. Or if they come up with something entirely new I'll take it ofc.