Deeper Insights interview questions

Once you apply, you get sent a coding task. The email says: "The problem itself is designed to not be too challenging but is an opportunity to demonstrate your overall engineering ability beyond just providing a minimal working solution.". They also provide links that explain the rest of the process, claiming they will get back to you asap. I submitted my solution - on which I had worked for several hours, and that included a lot more than a minimal working solution as I addressed lots of edge cases, and tests for them. I did not hear back from Deeper Insights for a whole month, and then I got an automated email saying that they dont think I am the right fit with no feedback on the solution at all. I don't think they even opened it. One of the most disrespectful companies I've ever interviewed with! Don't waste your time on that test 😂