That last example... shudder.
Writing a prose post is a bit like poetry in the sense that you still need to choose the right words in all the right places without anything unnecessary. Word count alone is not evidence of quality, but you also need enough words to adequately cover the topic. It's a difficult balance requiring practice. If criticisms sting, it's an opportunity to learn and grow.
Hive is a great platform to learn to hone your writing skills... as long as you're willing to learn.
And to reference another of your points, one can't progress by spewing posts about how awesome HIVE is, or what the Bitcoin charts might mean, unless there is something of real substance to add to the conversation!
Unless you're lucky and hit a whale lottery, but you can't rely on luck all the time on Hive