I am a jee aspirant drop this year but can't get selected. due to covid 3 months left for January jee should I take another drop please any suggestions

Hello student you should take again a year drop only if you're enough determined and have patience because there's no guarantee if you'll get selected in Jee Main 2021. But yes definitely you should take a drop if you're willing to pursue engineering from top notch colleges and you've the potential to work hard and smart enough to qualify Jee main entrance examination.
Cut off vary every year on various factors like level of question in examination seats available and total nunumber of applicants in the entrance examination.
In case if you don't want to take a year drop and want to get admission on the basis of marks obtained in previous qualifying examination or Jee main marks scored,i request you to please let me know so that I can check and provide you the best eligible options for you.

You can use Jee main college predictor - https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Feel free to comment if you've any doubt
Good luck