Dayshape Software Engineer Placement interview questions

The worst interview experience I have ever had. Upon submitting my CV and cover letter, the hiring manager for this role emailed to arrange "a short video call to discuss the opportunity". Nowhere within this communication was the word "interview" mentioned, neither had their application process been described anywhere online or in the job description. So naturally, I assumed the call was exactly as described in the email (i.e. a short video call to discuss the opportunity). However, upon joining the call, it became apparent that this was in fact an interview. I questioned whether this was the case and she just looked at me as if I was stupid. Regardless, I got on with it and did my best to answer the questions with zero preparation. Meanwhile, she provided minimal feedback, giving no verbal or non-verbal cues to indicate active listening, and generally made me feel uncomfortable with a noticeable lack of warmth - failing to return my smiles, build rapport, or put me at ease.