...okay, I'm going to try and tackle this.
I really hate to be that guy and i know i might be hated for this but SLAJ was a good idea but it isnt fun at all not in any sorta way SLHG was actually more balanced then this because it didnt suffer that hard from the effects of the gravity unlike SLAJ
To clarify, characters actually suffer less in SLAJ, most notably the ones with momentum-based recoveries (Sonic, MegaMan, Duck Hunt).
where throwing out short hop aerials are dumb because you wont hit anything at all, and im dont sure what direction SLAJ was going in but its literally a nerfed melee where Sheik is GOD tier and its about whoever has the best aerials and hitstun
I'm not sure how you reached the conclusion that throwing out Short-Hop-Fast-Fall aerials is different enough between SLHG and SLAJ to the point of being "dumb". The difference in speed between SLHG and SLAJ is 22, and the differences to landing lag and air speed is quite subtle.
Having good aerials is a plus in SLHG/SLAJ, but with the overall boost to their effectiveness, a proportional one that means the more landing lag a move has, the more of a reduction it will receive, which aerials are bad, exactly? Bad enough to be outshined by the so-called 'GOD', Sheik?
It's also worth mentioning that hitstun is not a character-specific property, nor has it ever been in any smash game. Hitstun is a universal property that is applied to all characters.
and the set for SLAJ is to reliant on speed which i actually see where your coming from but it doesnt really help THAT much i think we need a bit more power because if im correct more power means more hitstun right?
You're technically correct, but that wouldn't change anything. More damage (i.e., an increase to the power stat) would cause more knockback, and consequently hitstun, but it's moot. Hitstun is directly affected by knockback sustained. More power won't increase the hitstun multiplier, the hitstun multiplier is a constant that cannot be changed.
As for the rest of your post, I'm sorry to say, but it just sounds like Johns to me. Change is scary, but, hang in there. Knowledge is power, and hopefully by the time you've read all this, you'll know that much more about how to improve.