Ladybird aims to build a true new browser engine bit it's using big Google libraries like ANGLE and Skia to do it I don't know it's really fair to frame it as escaping Google completely like that.
The goal with Ladybird is to be "independent" in the sense that nobody influences their decisions. However, they have no desire to be independent from a technology stand-point (other than being Open Source). In fact, they are talking about moving to Swift as their core language.
Wouldn't a hard fork Blink instead of LibWeb still achieve this goal?