So I've had the game about a week now and I've gotten to A this morning. Way less stressful than B and way more fun. I'd say I'm going an average of 6-3 every game in A, with some better games looking like 10-2 against A+ teams.
I got there by just playing patient, not letting stupid losses bother me long term, and just slowly climbing without caring about my rank. I used
this build using a normal Splattershot or Custom Squelcher depending on the maps in rotation, along with some other random stuff I felt like doing.
So my advice to you guys is to just play and not worry about gold or rank. Stay positive and find an alternate weapon to use for map rotations that your main weapon doesn't do too well on. Just let yourself win and lose, and slowly climb the ladder over time until you find yourself in A. Good luck!