I am scoring horribly in DILR section. Barely solving 1 set properly. What should be my strategy at this point to improve that?

Can you solve more sets without time limit ? If yes, then the problem is that you are selecting wrong sets and panicking. If no ,practice more sets and choose your strength like seating arrangement,matrix etc and focus on that.

Hey,first try to get familiar with almost all the concept which keeps repeating...i know in Dilr the spectrum is huge...but try to do at least 3-4 sets of every concept type..like:
1)data change over a period
2)basics of all charts and CAGR SAGR etc
3)cummulative DI
4)special charts
5)arrangement
6)einstein puzzle
7)selection and distribution
8)truth lie concept
9)venn diagram
10)table with missing value
and leave 'Games & Tournament' if you are not very comfortable with it,because it takes time to master and will be lengthy too..just cover the 'knockout games' only.
ATB Buddy

Starting with DI can also help.

Yes. I'm able to complete almost 3 sets without the time limit. Thank you for your suggestion