Premier Rides interview questions

I had a phone interview with the office manager, followed by an in-person interview with the director of sales and marketing. The process was generally disrespectful of my time. It would be weeks in between communication from them, then I was expected to jump when they were ready. After my in-person interview, I was asked to complete an assignment "to prove my ability to do the job" despite having sent them my portfolio. I completed the assignment, sent it in, followed up, and was completely ignored. However, upon checking their company social media pages, I saw that my content ideas were in fact being used without compensation or my permission. I wouldn't want to work for a company that treats its candidates this way. I don't imagine it gets better after hiring.