Frustrated by not getting into Google (again)

I'm extremely biased because I'm the co-founder of Formation, but I would consider coaching (not necessarily at Formation but somewhere). It's possible that you're over focused on just passing LC DSA questions and lost track of the whole point of these interviews. This is the problem solving approach we follow and if you don't have a clean, systematic approach to problems, that could be why you aren't passing, so check this out: https://formation.dev/blog/the-engineering-method/