Are you saying their code was horrible and unsafe, or just that its a byproduct of using C++. They've been rewriting parts in rust: https://github.com/LadybirdBrowser/ladybird/blob/8f0a1b19114....
> They also re-implement everything whether it is needed or not.
No they don't. SerenityOS did, and that was the goal of the project. But Ladybird has plenty of third party libraries.