I think Android updates intentionally made the Pixel C slower. It was a noticeable process, up to the point they stopped supporting it. I’d downgrade to an earlier version, but there’s such poor support in Lineage, I’m barely able to run the version that’s on there now.
Such a shame, because it’s still an amazingly beautiful device.
Seconded. OP, if you can write Markdown, Hugo will turn it into a website.