Not sure about your niche, but for mine I see magnificent changes. In 2017 I could create a quality site with great content, create some quality links and simply rank. As it should be.
How about now?
I do the same like above, but my site first sticks to page 5 or 6 for 20-90 days until it moves to the Top 10, then it stays on #1 for one week, until it gets pushed to page 2, slowly climbing up to the Top 5, but later getting sent back to page 5, until it eventually comes back to page 1.
The most ridiculous is....when I check who or what is on page 1, while my quality site is on page 5, then I don't know if I should laugh or cry. Spun content, YT videos, spammy websites etc.
It seems at this time the Google algo is completely retarded. At least in my niche. It seems so totally random.