LeanData Frontend Engineer interview questions

Contacted by recruiter. Was given a 45 minute coding problem in javascript and was allowed to use Google. Coded it in 20 minutes and advanced to next round. Then, I was given a take home test to build an expense tracker and document it. I spent eight hours fixing it it. It's graded based on optimizations an documentation. Advanced to next round which is a demo. I spent four hours making a presentation covering all my design reasoning. They seemed to like it. Finally they surprise me by asking me to code, and I'm not allowed to use Google. I don't know Javascript syntax so I'm unable to finish it. They ghost me. Unprofessional company. This would be okay if I didn't waste 12 hours doing everything they asked only to be met with complete disrespect by not even having a human tell me my results. Engineering team is somehow 88% Asian so it wouldn't surprise me if they have some preference for employees "culture" fits.