I'm so sorry.
I have no real answers, but I wanted to tell you that I've also had some bad experiences with REs.
I am also polite & not confrontational, rude, or hostile. Yet more than once I found that simply asking questions - politely & sincerely - was enough to annoy the doctors.
Many of them like to take our money, but they want easy patients. They do NOT welcome a challenge & they do NOT seem to truly remember how deeply painful the quest for a child is for the patient.
I'm not saying all doctors are this way, but in my experience, most places are mills. They want to take our money - a lot of it - & move us through their system quickly, spitting us out the end pg. If that doesn't work so smoothly, we become a burden. We ruin stats & we question them, which they dislike.
Again, just my experience, but it spanned multiple clinics, including those which ultimately helped me succeed.
You have to really educate yourself & advocate, which is made extra hard if you're faced with hostility.
Hang in there, Bharani. I do think you're on the right track.
The only other suggestion I have is to consider Dr. Karen Pace, simply b/c she's well-versed in RI & her job is to advocate for you. So she's like a consultant working FOR you, explaining things, guiding you. (I have no personal experience with her, but I've mentioned her before.)