I dunno if everyone is a jerk but even super conservatively 1 out of 10 people are so you will got 1 in every game. In reality the number is probably more like 3 in 10 people, plus an extra 2 out of 10 people who are only mean to women.
So yeah the chances of not having one jerk in your game is basically none. Nice people usually stay off chat so we just hear and see the jerks.
It’s tough playing a game as a woman with a player base half of whom have never spoken to one without ulterior motives. Sorry about your experience. Try to make some friends and play with them. It made my experience of learning OW much more pleasant.
If flirting isn’t reciprocated, don’t do it anywhere.