You would do well not to make such accusations; that the tourney was closed and people dropped out because of their 'inability to adapt' could not be further from the truth.
Play a 2h tank in a group, compile your results, and tell me if you would honestly want to go into a competitive event, against some of the game's top players, with a 2h tank - knowing that you'd be doing your team a disservice due to taking less of their damage via a worse variant of Guard.
Saying that people are throwing their toys out of the pram, in the face of valid and constructive feedback, is rose-tinted glasses syndrome.
Aside: soloing on a 2h Chosen will not really paint you an accurate picture of what has changed, nor will the ramifications of the change be immediately obvious to you. If (by your own admission) you spend most of your time soloing/pugging, then you won't really feel the difference; if you are grouping up, you will feel the difference. Do not assume that people are reluctant to try stuff out, or lack the capacity to do so, if you cannot grasp the severity/ramifications accurately (due to lack of experience in relevant scale/environment). Not a dig at you btw, and I know you are a capable solo player.