I am being added automatically to QM 1v1s, and have no idea how this is happening nor how I can stop it. Title is always "QM: <player 1> vs <player 2>." Can anyone help?

you need to go to the quickmatch part of the unity app and toggle off the checkbox that gives you recurring games.

Thank you! Never use the Unity app, so I never saw that setting

So I checked QM yesterday for the first time and this is what I see as problem:
When going to QM page, the "Invite me to multiplayer games" box is checked automatically.
So it turns out Fizzer assumes when someone visit QM page, he wants to play it.
In contrary to that, it seems many people go there just to check things first. (I myself did the same). Then they are wondering why they are invited to unwanted games.
So all we need is to not have the box automatically checked.
Which takes like 1 minute to change I assume.