Don’t believe everything you read on the internet.
Even you were spewing “oh if you played XXX you didn’t earn it it’s EZ mode to use certain jobs”
No one job will carry you anywhere if the user or combination of users suck. Seems you learned that shit that hard way.
Having a certain combo or using a certain job won’t ensure anything, most of the competitive people are already placed and ranked in crystal, they kept playing and pushing over making posts everyday about how OP they think something is.

All you can do is play during peak hours so you get a healthy mix of those still climbing with the mindset to win over those who are stagnate and can’t or don’t want to dedicate time to climbing.
I learned on my climb to crystal I was getting certain people during certain hours of play, they tended to do really really bad, but being on during peak I never ran into them more than once, and I had better luck overall with getting different diverse groups that wanted to win.