You say that you arrived at the check-in counter at T-60. Staff say that you did not. The reason for your late arrival is irrelevant. You just cut it too tight. The check-in deadline at BOM for EY for those flying in Y is T-60.
EY did not handle this any differently than most carriers and your use of obscenity won't change that.
Blaming EY for something which is 100% your fault is 180 degrees off.