You should play the ball, instead of the man. Instead of simply taking all of the criticism and shoving it in a pigeonhole marked 'Jolla haterz', you could explain why it is wrong. After all, the last line above undermines your argument, since if people wanted Jolla to fail, then they would also want those sailors to be out of a job. ...
I don't think it's fair to place such a burden on those who have given Jolla money in good faith. A loyal football fan paying for their season ticket may criticise the players without having the skills of Lionel Messi.
Perhaps it is true that some criticism has become less constructive, but that is inevitable while people become increasingly frustrated at the lack of straightforward communication from Jolla. They have basically been playing bulls!t bingo for the last few months over this tablet business. Disappointment is relative to expectations. Jolla raised those expectations with talk of 'people powered', 'unlike' etc. Nobody expected a perfect product delivered exactly on time. They just don't like being blagged.
Not everybody can be so flippant about losing such money, and you should remember that the crowdfunding goal may not have been reached in the first place without the support of those people.