You hit the nail on the head when you said that people who are invested into any Crypto are so much passionate about it that they will ready to fight with you or give unreasonable excuses to prove their point.
Two classic examples of it are Verge and Tron.
There is so much hype about these coins, that if you ever try to reason with people on these coins they will berate you and and treat you as if you know nothing. Verge is the stupidest privacy coin. They missed deadlines on implementing features which were there in top privacy coins since inceptions.
I also dont blame people for defending it. Most of the youtube channels are paid to promote specific Cryptos. an insane example of this is Electroneum. anyone understanding the basics on mining and tech involved, can go through their white paper and point out the deep hole in it. Yet, did it stopped passionate Electroneum investors into sending in it. NO. Recently one Reddit user found issues in their code. Instead of acknowldging and accepting that mistake, Electroneum community started bashing that user. This is not how normal tech operates. even big companies like Microsoft etc, do a Beta release so that selected users can do testing, point out issues and provide feedback for companies to work on.
There is absolutely no feedback mechanism in Crypto industry. Atleast for most of the Cryptos.