When I bought my latest car I did take someone with me, a man, as it happens as I wanted someone with me who knew more about the inside workings of cars than I do.
However, I made it clear from the start that I was the one buying the car and I did all the talking.
The salesman, knowing I was the one paying the money dealt with me. He didn't talk down to me, he was businesslike but friendly, as was I.
I was more than happy with his attitude. Had he been in anyway smarmy or creepy or made me feel he was trying to patronise me in any way, I'd have walked away and gone somewhere else, as I have in the past when the salesman started going on about the lovely colour of the car and other such crap; but that was a number of years, and several cars, ago.
They're quite a large dealership and I get my car serviced with them. Never found any of their staff creepy.
So whilst I agree some car salesmen can be creepy, if you go somewhere that isn't stuck in the 1970s you'll get treated like a serious customer rather than a 'little woman'. Just choose your dealership carefully.