I got beated from 80 to 0k by some pro players... Kinda heavy for me. But it's because I am simply not strong enough. How can I learn to play better somewhat fast? Because I haven't got time to play 20k more games, tho there is still no guarantee I'd actually play better after all that. (looking to rather weak custom belt players.)

You will be good around 3rd Dan. Just play different mods.

There is a hard way too - play in SIngle Player. (no matter what people say, it is the best way to get better)
P.S: Not sure what do you mean by "got beated from 80 to 0k"

I am already good, but it's not enough, because I've played against weaker
players where I usually own them, but it doesn't work when
these very good players grab me and lift and all do all that stuff.

It means I lost 80k in duels today. (I won't play more duels till I'm good enough.)
perhaps, but I need to be very good. I should learn the technique hardcore aikido
players use to be at least as good as they.

I suggest trying to take some classes at Unibash or any other places that offer ingame classes for aikido. Also, just playing alot ingame for practice.

heh,stripped 20k from him..
he's pretty awensome for 2nd dan

Play aikidobd instead of aikido when multiplayer.
Gives you opportunity to move more freely and learn how your joints work and where.
ps. when wwolfer tells how to do something or not to do just listen to him

Practice Perseverance and Patience.