If you're using your chakra abilities fully for ONE multi-fight, then you're doing it wrong.
Figure out what each stat does with the others. Some people do the mistake of investing into one single stat or into all of them but never a combination. We're given each stat for a purpose. Learn them and make them your own.
I was about to also post your stats and go over them, but I saw that you reborn'd again.
And, no, enemies aren't "a lot stronger", you're just "a lot weaker" than them.