1. Most of the times they are pretty justified, though there are some exceptions admittedly.

2. Arena is fine as it is, also in arena you can only match with players within 10 levels of you, and there is 1 month of grace period for new servers. So with that being said, most players don't get very unbalanced matchups. Also it should be noted that BP other than 10% of your initiative doesn't transfer over to Arena so in most battles, battle power doesn't matter anyways. Also your "RIP. 9 out 10 most of the times u are matching with people with super higher BP than ur." Is false lol. I am a F2P and I can fight other players with much higher BP and win fairly consistently. Of course people with insane ninjas like Kurama Naruto may still beat me, but they deserve for saving up and getting them. Don't complain about losing, just do something about it, like get a meta ninja team (standard kushimaru blitz is great for ranked)

3. While yes current decisive bond kinda *s, they have tried to make it better. If you think about it, the main reason you get matched up with higher level players is because there are no willing lower level players who want to participate. If everyone decided to do Decisive bonds, then this problem wouldn't exist. Also again, your "no one touch this. well at least if u are not top 1%" isn't true again. Though it may take some time to get your battles in, it is most defiantly possible to win a few if you get your power to 50k+ (which isn't even close to top 1% btw)

4. Ehh this ones debatable, it can go both ways but I see what you mean. But eventually there going to be some unhappy group.

5. Convoy and Plunder is a really great feature if used correctly. While yes it can make people toxic, it also is a way to inspire competition which is one of the biggest factors that help communities survive. Again, if you don't like your situation then just build up your power and you will be able to beat them eventually.