Have you looked at your recent score history? It is riddled with 67-70 scores - you are definitely not averaging 7-10 under par, even in "normal game play". (I realize there are a handful of 62-64s mixed in there, but they are not your norm and most are from when you were TM under easier conditions)
Plus it looks like you just moved from TM to Legend around the first of the year. There's going to be a learning curve that'll take some time to get accustomed to the back tees, higher winds, and faster greens. Your equipment is mid-level, and under the new tier conditions it's going to be much harder (not impossible, but harder) to compete with the guys with the top or second best gear. (Good news is you're about to L85, and there's a good Cally driver/irons available there that would greatly help you if you wanted them)
Also factor in that near the end of your TM tenure, you were the big fish in a small pond in all those tiered Ready-Go's and Monthly's you played. You were the apex predator of that tier, playing against others who were mostly newer to that tier. Now that you are a freshly minted Legend, YOU are now the small fish in a much bigger pond. There are a lot of top-end Legends who are really, really good, actually averaging 10-12 under, they just haven't reached the required 500 rounds to move on to TL.