It may be tough for beginners. But if you stick with it you can figure it out.
You seem a little upset. I'm not going to read all that though, it's just too much. Just take a break when you get frustrated or lower the difficulty. Also, you can experiment in training mode or watch a bot match to get a basic understanding of a character.
I didn't make this to frustrate you I want you to have fun with it.
Honestly I can't see how it's unfair, the game is clearly based on more on games like MvC, Melty Blood, or some SNK fighters, and is mostly focused on aerial combos and normal cancelling, as someone who isn't even that good at fighting games I actually found it fairly simple to pick up, and I can pull off some fairly good combos as some of the more combo heavy characters like Aroma and Texas. You say you have a lot of time in street fighter but from what I can tell SF is a lot slower, more ground based, and has very short combos, so trying to play something like this like SF wouldn't work well.
As for balancing, the game does have some issues there, but if your takeaway is that Kaze is the most OP character I can only come to the conclusion that you haven't fought the majority of the cast, Kaze is low-mid top tier at best, he's a little annoying with his charging grabs but if you go for aerial aproaches or throw out some projectiles you can stop him easily. Characters like GL, Bertha, Trinity, Ra and Jumbo are a lot harder to deal with and have far worse moves and less weaknesses than Kaze has. As for feeling out of place, I really don't know where you're coming from, if you mean there shouldn't be muscular characters, Svetlana and Zafta exist, and if you mean there shouldn't be male characters, Rapid and Cytus exist. I think there should be a few male characters if nothing else than to serve as some decent victims for the girls, and besides it's Kaze's game, I feel like he's earned the right to put his own character in it.
As for difficulty, yeah the game has issues there although as someone else pointed out MUGEN handles bots in not the best way, I think a lot of the characters tend to execute moves a little too quickly, the worst of this is Jumbo's command grab which he'll almost always punish you with if you get close to him, even worse is he basically always starts the match with it frame 1, so you're getting hit with it every round start unless you jump frame 1 (which he'll probably counter by punching you out of the sky anyways.) And the worst part is that it deals around 1/3rd of your HP, so getting hit with it just once is more than enough to cost you the game. Not sure how AI is handled but I think adding some starting delay onto moves like that might be a decent idea, or at the very least toning down the HP loss due to how often you get caught by them.
Overall I think the game is a little easier to play than you're making it out to be, but I can understand becoming frustrated especially since a lot of matchups tend to be hard if you don't know the characters strengths and weaknesses. I'd just lower the bot difficulty and try practicing some combos for your character, and if you just want to watch some girls crush and gas each other there's always the CPU match option.
https://streamable.com/663w3e 2-0 on that stage and I'm not even that good at traditional fighting games, you might just be washed bro.