IMO stick with 5s. My first few weeks were with less resil than you but only 4 weeks into the season. It was taking me 40-50 games to get my 5 wins at that stage, but it was all practice. I would eventually come up against similar nub teams who I could burst down or teams who I assume were win trading who wouldn't even enter the arena.

After 3 weeks of points you get your purple weapons and it is onwards and upwards from there.