Banyan Software M&A interview questions

I had a bad experience interacting with this company as a candidate. I'd applied for a senior position and did 3 rounds of interviews, where I was then told to expect to hear back regarding next steps in a few days. After not hearing back the following week, I tried following up with HR once a week over the next 3 weeks with no response. I even reached out via LinkedIn on the off chance my emails were being caught in junk.  I had to make time to do 1 of these interviews while on vacation and 2 other on the day of my flight because the company wanted to move fast, so the lack of response is very unprofessional and rather rude. The external recruiter who'd contacted me first even reached out to HR about the radio silence, at which point an excuse and an apology were provided with a promise to provide feedback "next week". Needless to say, that never happened either.