even though there are a million different reasons to be cynical and negative, if that's all you ever point out and talk about you're not really going to do much in terms of changing
This is true, as are many other things you say...however, the mind works in mysterious ways and if the mind is overly negative (possibly due to things completely separate from the blockchain/crypto) then it is often perceived to be much easier to 'give in' to it rather than finding the courage and fortitude (often self-honesty) to begin the climb upwards. I think, if everyone was honest, we've all been there at some point, or will be.
"if you don't have something good to say about something, better not say anything at all"
Also definitely, but sometimes getting it out at arms length (out of one's head) can have positive benefits through being able to gain some perspective on it, see it more clearly so to speak. Of course, negativity can be difficult to see through as well.
In respect of Hive...I don't know who you are talking about but for sure a break might be needed...even just a break from the same old dialogues in posts/comments, (write something totally different) but maybe a week or so off completely as well.
I'll be honest and say that sometimes I feel a little dismayed about a few things on Hive/blockchain and it can be difficult to hold that in, not let it come through in one's writing...I guess the focus needs to be on containment sometimes.