Foreign Inward Rates from HDFC seem extremely exploitative?

Have been getting paid on Deel from my employer in USD, and I have been using SWIFT to transfer USD to my HDFC account, and then get that as Foreign Inward to INR. IN HDFC, I have preferred banking, use their CC regularly, and have FDs worth significant amounts (for my age), have a Demat Account as well with significant history (for my age).

Now today my transaction of 3821 USD came in, and today's RBI Reference Rate was 87.2 for USD to INR conversion. HDFC gave me a measly 85.2. I tried negotiating with them, and they said "we can only do for bulk deals" or something. Contacted RM, who said they have a standard rate that they give that usually cannot be changed, but to mail him before submitting remittance next time to see if they can help. Called the Branch Ops manager who basically said the same - to call him so that they can check this.

RM then pushed me to invest in a Tata AIA Pro-Fit Health Insurance investment thing. I told if this doesn't get solved, I won't be investing a single penny. This RM has, everytime I have gone to him, pushed me to invest in SOME sort of investment, health insurance plan, HDFC LIfe, something or the other no matter what.

The guy who deals with Foreign Remittances basically did not help with negotiating at all. This would result in a huge loss for me over the course of a year, as I lost basically 8k INR this month in the currency exchange to HDFC, which in a year results in apprx 1L at my current salary. Went to Axis who said they are able to give rates within 60-70p of the RBI Reference rate and would work with automated disposals and stuff. Is it probably better for me to switch/bring this up as a grievance to HDFC/priority redressal?