IXL Learning Science Curriculum Designer interview questions

I made it to the second round but didn't make it to the third. I really thought I was a qualified candidate, yet, from the quick turnaround from my take-home test submission it didn't seem like the team gave me much consideration. Due to them not offering feedback, I too am curious why the interview process is structured in this way.

The interview processes consisted of a standard review of resume, phone call with a specialist in your field and then an assignment. But here is where is gets interesting, IXL will put you through their process and keep you in the dark the whole time. You will work diligently on the assignment because you are an expert in your field with years of experience, but the assignment will not be good enough. You will get the same rejection email that they send everyone from a "no reply account" and you will never hear what you did wrong even if you contact them via another email address. In the end, applying to IXL is simply a colossal waste of time. I honestly recommend looking elsewhere.