@LLcraigJ0302 Let me give you a little perspective here. I came out of almost twenty years of Halo, so I was plenty familiar with shooters... to no avail whatsoever.
For the first three seasons of this game I did not pick up a weapon. THREE SEASONS - NO WEAPON. Why, recon, why would you even bother playing if you're not going to shoot at anyone? Because that's how I learn. I needed that time to learn one single legend, one single map, basic movement, basic player behavior.
The weapon sandbox came later, and only very slowly. I still consider myself a terrible shot. The weapons in this game conform to the current shooter standard, which is to say that developers design them to be virtually unusable so that only a small percentage of players can use them competently. The rest of us struggle through endless amounts of firing range practice and in-game practice, and the truth is that some players improve a little and many will never improve at all.
I'm somewhere lower down on the improvement scale and have most definitely stopped trying to be a better shot. Why, recon, why aren't you trying to be a better shot??? Because in battle royale being a good shot is about 30% of the game. The rest is understanding why other players do the things they do, and setting yourself up for victory. That's how you win. Not by out-shooting the human aimbots, but by being smarter than them. A lot of people find that to be a boring way to play - they believe shooters are all about shooting. I don't give a tinker's damn what other people find boring. I find losing boring. So I win. And I didn't need a Cronus to do it. I needed patience.
I don't know if this is a viable path for you, but it's something to think about. Whatever you do, don't give up. Just plug away. You may never get to predator, but you'll get somewhere. Best of luck.
Oh, and I'm gonna contradict dSKyNafinchin on one point: do NOT use arenas for practice. That's what I would call "trial by fire," and a really good way to discourage you even more. Battle royale may have a huge learning curve, but at least it allows you some control over your pace-of-play. Arenas is just a frenzied bloodbath. No. Fun. At. All.