Replying to The effects of skis marketed as expert to advanced for a begginer

Backstory: I am going on my 8th day of skiing. I've been making good strides with the help of fine folks on this forum and some proper ski instruction. This weekend I had tried a different hill and the greens/blues were much steeper than my home hill. I had found an awesome deal on my first set of skis, this is where it gets controversial. I am 5'9", over 220 lbs and settled on Blizzard Brahma 173 long / 88 at the waist. I ski in New England, the ice coast and I knew I would have a ski that I could grow into, skis that did well on frontside groomers and icy conditions, also a ski with a stiffer flex to handle my weight.

Problem: On gradual slopes I feel good, skis parallel, can change direction when I want, maintain speed, and able to stop confidently when I have to, no real problems there. Now when slopes get steeper I apply the same technique, but my inside ski seems to get stuck and I lose confidence FAST, especially when turning left the problem is much worse for some reason. My technique gets sloppy immediately and I feel the only way to gracefully slow down is to go back to the old snowplow, pizza. Now my mind is telling me that it has to be the equipment right? Joking but little bit of seriousness here.

Question: Is there a possibility that my skis are too much for me right now? Are they too long? (at my forehead now). Is it too wide which affects rotation of the inside ski? Too stiff to throw around? Are skis marketed as having excellent edge hold too much to rotate for a noob like myself? I have no problems shelfing this ski until I am ready to confidently use them all mountain, but could the equipment be playing a role here? Do I give it more time?