Volume (CA) interview questions

At first, the interview starts with a small backend task in Rust in whatever technology you like. I shall not disclose the task out of respect for the company. After the task, you just get a Yes or No without feedback. In my case (given it is not a generic email) the email did say that my work was high quality, that they don't deliver feedback out of respect for the experience, and because they can hardly judge in such a small task. Concluding that they think I might not be a cultural fit. Next, you would normally go to an interview for a discussion with their CTO. There might be more steps to the process that I'm not aware of. I consider this a negative experience since I strongly believe that deciding whether someone is a cultural fit without a conversation on why certain choices or assumptions were made (given the exercise doesn't provide context or non-functional requirements), to me, does not make sense. In previous interviews where I was on the other side of the table and in previous companies, we always interact with the candidate since we believe why someone does something can not be assumed. However, they were very friendly to provide me with some additional feedback after asking for it. Yet the process still determines culture fit based on decisions that they don't know the reasoning of without seeing/knowing/talking to the person.