I had a very similar experience, I was leading the selection process for our new endpoint security vendor, Crowdstrike people: - verbally attacked/abused a selection team member - were ranting constantly about golf with our execs - were dismissive and just annoying throughout - raised hell with our execs when they learned they were not going to POC, basically went through everyone of them simultaneously - I had to get a rep kicked out of the rfp as he was constantly disrespectful

We did not pick them, and cancelled any other relashionship we had with them, in IR space by example.