However some people criticize horribly (and they have the right to) and it makes me (or the do-er) very mad, because other people might listen to it, and that spreads bad reputation or ruins sales.
There are statements that, as hian has pointed out, are objectively incorrect (or invalid) and it's best to discern between what is and what isn't while taking everything in. Critique-- at least as far as I believe-- should be an objective process. Color me an optimist, but I believe more people know better than to take anyone's word online for anything without any sort of proper justification.
While both McTricky and Lankaino have valid points, they're overreacting just a tad and are taking this thing wayyy too seriously. Lankaino's personal attacks on anyone that choose to believe otherwise is unnecessary. McTricky's deriding of Tempest based on personal preference is also over the top. But hey, maybe that's just the fanboys in both of them talking.
If somebody says FF7 is **** because you can't customize the skills of the characters freely, that would be objectively wrong. It's not a matter of opinion, it's a matter of the reviewer being ignorant.
Agreed on pretty much everything you said.
I'm unclear on the part quoted though as FF and Tales are wildly different in how they approach mechanics. Modern FF has established itself as a franchise that constantly attempts to re-invent the wheel, so to speak. As far as critique goes, I believe that while there is room to compare one FF from another, each installment is intended to be analyzed on its own, given how little of anything carries over to subsequent installments mechanics-wise.
Tales, on the other hand, has a more or less established set of rules/mechanics that receive minor tweaks and additions every few installment. Much like when analyzing literature, I personally figured context/history would weigh in a little more in this case.
While not necessarily the universal standard, this was the approach I took in critiquing Tales of the Tempest. While I don't outright decry its existence, I do feel that personal tastes aside, it was a disappointment.