Hi!
My thesis is that the skillfloor of Crystalline Conflict is insanely high and that's where most grievances with the mode actually come from.
You need to understand and better yet play all jobs, understand each job's roles, kits and limit breaks, understand positioning, pots, be able to adapt to both different team comps and varying skill levels, be able to focus targets, focus the *correct* targets, pressure and play defensively in a myriad of variations, learn when and where to regen and understand all the different relations between and exceptions to certain skills and effects. You need to learn to target correctly and adapt to lag. You need to use and understand quickchat, you need to learn the individual map's quirks and the different job's skill interactions with those, you need to learn how overtime works.
It's just so goddamn much. If you go frustrated, focus on your own knowledge and experience. There's always something you can learn.
If you get angry at your fellow players, cut em some slack, even fundamentales are often not obvious for new players, and often mistakes go unadressed because nobody wants to help. Help em learn if you like.
If you get angry with the designers, realize that what you might hate about the mode and want to see gone may be someone else's favorite part about it. Except for analysis chainsaw proc, nobody likes that and there's no excuse for the devs to keep it in the game.
If you get angry at yourself, remember that's a very complex mode and you don't just learn it all in a day. Give yourself a chance.
Switch things up, play some other job, you need to learn them all anyway eventually. Do something else with your time, come back when you wanna play some, not because you wanna climb.
Never try and force climbing, concentrate on the current match.
There's a very high chance you haven't even reached the skillfloor yet. You will get miraclebursted again and you will have realized the enemy team has a White Mage too late *again*. But eventually you'll crack it.