Technical interviewer/lead comes off as extremely inexperienced, uses questions taken from a popular "brain teasers" book about the programming language in question, and struggled to answer basic questions I ask in every interview.
The PM seemed to have their stuff together.
One major red flag was they did not ask any questions about their core business proposal/tech: CDN, security, web protocols. It gave the impression that they aren't too selective about who they take on board.