I HATE LSS

I’ve been struggling with LSS lately.
I honestly hate running that slowly, and it feels like I physically can’t run any slower than about an 8:30 min/km pace. The frustrating part is that my heart rate is still too high, even at that speed.
Right now I’m on vacation, where it’s around 90°F, which is about 20°F warmer than where I live. I know that the heat can significantly increase heart rate, so I’m trying to keep that in mind.

However, even back home, I feel like my LSS pace and heart rate aren’t improving.
I still struggle to keep my heart rate below 150 bpm, even when running as slowly as possible. It’s frustrating because I feel like I’m putting in the effort, but my aerobic pace doesn’t seem to get any better.

And I really need it due to the fact that I am in LE.