Authors get their fair share of such words when querying agents. If I had a taped message I could send to all struggling authors it would run the word "subjective" on an endless loop.
"Where I find_______( your character ) a believable character, I'm afraid I'm just not passionate enough about..." blah, blah, blah.
At that point, toss the letter or press DELETE.
Agent A has no doubt read the first few lines, discovered the characters name so she/he can make the rejection letter sound personal ( hello, doesn't agent A know we authors get hundreds of the EXACT same 'personal' rejection over and over??? ) and therefore less - what - disappointing?
On one such occasion after receiving one of hundreds of 'personal' rejection letters I thought, "You may not be passionate about Zoe and her story, but I am."
And that's what that matters.
I'm so glad I don't swim with sharks anymore. Man, who wants to lose limbs every time you get in the water?? I need my fingers to write.