Allegro interview questions

Weird, they were trying to show me what I can't rather than extract something they were interested in. A bit doubting if I can cope with their scope of work,

1) DevSkiller task - you have to add some code in places, ASP.NET 2) Technical interview - interviewer shows you code examples and asks some questions about it, If you have knowledge about async programming, C# data structures, basics etc - it is pretty easy, at the end he also asked some questions on GC, relational dbs 3) System design interview - design chat on ecommerce page, he also asked some questions on dbs or system design through process. I didn't get any feedback even though I followed up, very unprofessional from their side, ghosting without any word, basically wasted my time But engineers that were interviewing me very adequate and professional