Your first point may be true, but according to the devs/mods we are subjected to changes.
Second point, people (including myself) wouldn't be so mad if we were able to get the rewards for our rank, but we are forced to hit six paths first, which for me I have played arena for an hour or so a day. Started at 40 rank points at the beginning and now am 33. You get matched based on level so I assume you haven't hit 85 yet, so you are versing basic lineups that are easily countered
Third point, I run control team (Chojuro, Ao, Mei, and Azure) which is a great team, but as almost a great teams go if you are slower then you opponent your odds of winning dwindle.
Fourth point, As said before I have played everyday in arena for an hour or so max till I get mad. There are other people on my server who play arena more than I do and aren't able to climb. Only people who seem to be able to climb have 50k+ bp. I have 40k bp and like 80% of the time my opponent is faster, which is why I question the whole matchmaking system and how you are queue'd. We were told we get matched with people our level, but it should be matched with people your level and around your current exp.
Fifth point, I remember what it was like before cross server and the queue times are awful, but telling people to break the ToS and make *t on the same server isn't a fix. Just an easy way to get banned if someone reports you.
I do not think you are flaming, but people are only spamming threads because not mods are responding to them. They want our feedback and trust me a lot of people have posted their feelings about the new arena, but this will keep happening till it gets fix or till the meta changes when the new treasure releases. Lets just hope some good changes are announced either tomorrow morning or when the events are posted because for my lineup and power I shouldn't be stuck at rank 33 in arena and I have been for weeks.