EMCOR interview questions

I thought this would be a great opportunity. It is a bit disheartening that they don't value a candidates time or effort and are unwilling to provide feedback. I went through 3 rounds of interviews, all which seemed to have been great. I was told throughout the process that they really liked me and were considering making an offer. I was strung along for weeks and they don't even have the decency to provide feedback on why they passed on me as a candidate. At least have the courtesy to show candidates that you respect their time and effort spent on the interviews and the preparation done for the interviews. I had the 3rd round interview with the director, which was also about an hour long. I was required to be on video while he did not show the same level of respect, which felt very one-sided.