You're being insecure. It's not rude to disagree.
Also, there's often no perfect combo of words, there's a spectrum of options and you just pick an operating point. Transcription is a longer word than "word" so there's a tradeoff. It doesn't feel like a chasm to me.
I’m genuinely curious what you were trying to convey by completing your, totally valid, disagreement with “so whatevs”? I believe this is the part that’s perceived as rude because the expansion of that, “whatever”, is often further expanded as the sarcastic form of “whatever you say”.
Never did that to me. Maybe it's a "you" problem.