[Bug] Battle For Azeroth Mythics - Scaling Broken?

Greetings, denizens of Azeroth.

I usually run Temple of Sethraliss on Mythic for the Polearm off the first boss.
So far, my RNG hasn’t been that great, so here I am continuing to run it in 9.1.

Or, I was.

Problem being, prior to 9.1 this was a fairly easy task.
It took a bit to do, but was rather effortless; in and out in a few minutes.

I tried it a couple days ago, and… not only did the mobs take DECADES to kill (I had to carry a lower level), but the adds were doing way too much damage to my pets and my character. It definitely was not worth doing, especially since I got another pair of bracers.

That said, I was wondering if anybody else has found difficulty in soloing BFA Mythics as well.
If this truly is a bug, I would love this to be fixed, please and thank you!

tl;dr… it feels like the upscaling for Shadowlands Mythics was accidentally applied to BFA Mythics.