No, I wasn't surprised, I knew his background and I had actually built, I thought, a good relationship with him, it just turned on a dime.
...he was using that he is "aerospace" to basically discredit anything we have to say and throw it in our face...like he is better than us because he has that degree. "I'm aerospace and know what I'm doing/talking about and you have no idea what you're taking about". Except we've got real world experience on these components. We were simply passing on what we've learned "in the field" to a guy who has no experience at all with this platform. The intent was to help him get a better understanding of the shortcomings and failures so that he, the engineer here, could address those issues using engineering methods/concepts. But he got all butt hurt, behaved like an angsty emo teenager and did the whole "block and publicly post DMs" move...so childish...