So what do you want another chromium based browser? The whole point of Ladybird is to kinda prove that a completely independent browser engine is feasible. Also, they are not doing everything from scratch for example it will use the same graphics library that chromium uses (Skia) and also now firefox. You should probably read the FAQ on their homepage:
https://ladybird.org/#:~:text=What%20does%20%22No%20code%20f...