D&D 5e alternatives?

I've only ever played 5e for my ttrpgs, but with WOTC showing its true colors, I'm trying to find a new system to adopt. I've been seeing people say Pathfinder 2e, and while i have a digital copy of the book I've been reading, i didn't realize how large it was until i saw it in a game store; the core rulebook is almost 3 times as long as the 5e PHB!

I guess what I'm looking for is a system that isn't as heavy as Pathfinder 2e but still has depth to it. Do you all have any suggestions?