II’d want to suggest something - if there is someone who is looking to get better at RCs - Id suggest them to do advanced official RC passages. They are amazing and you’d get great learnings from that.
For passages you didn’t understand or get right - try to spend a lot of time even 1 hr to understand every nerve of that passage
You’d realize that answering the question would become so easy
You’ll breeze through the questions like tick tick tick...
Writing it here - because I wish someone wrote when I was looking for guidance on getting better at RCs. I hope someone gains out of my insights.
Also for these difficult passages try to look answers on GMATClub because that way the voids in your learnings would get filled. Sometimes we don’t know what is the meaning of a particular sentence structure and once you see the explanations of those parts on other forums you’d not be able to extract essence or juice out of them.