Propel Solutions interview questions

Had a phone call, then a week later a 1 on 1 where the interviewer seems disinterested, and I was told I would hear within the same week. I didn't, so upon follow-up & learned it will be pushed until after the company's holiday. After the holiday, I did not hear back for 2 weeks so I had to follow up myself again, and then I got an assignment to do. Felt like I had to remind them time and again that the process was still going on. The assignment was interesting (analysis & ppt), and had to present it to the principal. A few days later spoke to the potential team for culture fit, they were very nice & I got along easily, but there was some self-doubt when they talked about a "positive" culture. A week later got the offer. Had a call with the founder after that to discuss details, and it was the rudest call I've had in any interview process ever. I was belittled for negotiating in good faith and even threatened that the offer could be rescinded. I ended up declining it after this call after the bitter taste it left. I'm sure all the negative reviews on here are very true.. can only imagine what actually working for them would be like.