Attempt 5th , bad score continues -ESR ATTACHED

Hi
I gave 5th attempt of Gmat on 24th February and could score only 640( V 38, Q39).
I had given 4th attempt on 5th dec 2019 and scored 640 (V 33, Q46).
In third attempt , i had 590 with V 34, Q38.
I am attaching all three ESRs.
Please review them and guide me. i plan to give GMAT again after few months ( need a break now from this frustration).

Plz help me with sply these observations:

Though my cr has improved this time , but sc in 3rd attempt was 91 percentile ,its 77 percentile now.Does it mean performing bad on SC(which is consider my strength).
Also how to improve from V38 to V42( because this time while attempting exam ,barring 2 SC and one cr question i could find whole paper very doable and could finish 55 seconds before the assigned time. is this overconfidence)?

Now coming to my nightmare, QUANT.
I donot know where i go wrong in quant and i had practiced so much.THe satrting few questions i could not solve at all , they were plain questions but i could not solve i know.
Given any high level question , i do solve them in practice test and at home but donot know why i could not solve such simple questions in exam.
And drop from Q46 to Q39 is unpardonable.
I have to improve to Q 50 now and i know i can do it. I can and have solved sufficient number of problems with confidence.

Materials used over past 2 years preparation (though scattered preparation)

1)Jamboree Red and Blue books completely solved.
2) OG solved and also whole material of GMAT PREP solved.
3)Exhausted all official prep tests .
had no test left this time.
4) Done with egmat quant and verbal course.

These 2 months i only practised egmat scholranium for both verbal and quant.
Daily i gave tests 31 qsn in quant and 36 verbal.
Scored 82-99 percentile in Verbal Scholaranium.
Scored 50 - 68 percentile in Quant Scholaranium.
Though i find quant part of egmat bit tougher than original gmat, still i never socreed this bad as i did in original gmat.
U am attaching all esrs ,plz review and help me out.
This is going to be my last attempt and i want to make use of this opportunity to cross 700 atleast.
Thank you