At the last boss. thinking of quitting.

I have played the game without looking in a lot of guides and such.

And now I have really bad trouble with the last boss.

I'm like level 110 or so.

And have upgraded the wrong stuff compared to everything people say that you should use, and it drains my will to play the game.

Some resources I have way way to much of, so I could upgrade freely, but some I have 0 left of.

Any tips on how to beat this thing?

is there a way to turn down the effects on the screens it's hard to see when to dodge the attacks.

I just want to went my frustrations.