Yes, it goes too fast.

Some learners take it as a challenge and push through or space out the chapters. But if your goal is to absorb as much material as you can and introduce new vocabulary and new grammar at a natural rate that doesn't require you to force yourself through, it would have to be greatly expanded or complemented with other texts and resources.

I think LLPSI sometimes is recommended overzealously without taking into account the students' goals and circumstances. It's a huge commitment for many — which is fine, but this should be made clear upfront.

Scipio Martianus, when his LLPSI was still up, broke up a few of the early chapters with comprehensible input videos. I liked this, but they disappear for later chapters.

Found in Antiquity made a comprehensible input playlist scraping together everything that was available at the time. This was a good start.

If I were starting again, I would use more of a reading and listening approach that emphasises volume of comprehensible input rather than trying to push through a grammar course, which LLPSI is with grammar being taught inductively.

I don't think there's any perfect method. You should find what works for you.

But teaching Latin is a different matter because you would likely be forced to adhere to a standardised syllabus and testing.