Argument are not won or lost. You either learn, or teach during an argument/discussion. Else you are is a "word fight", were both parties think they won, but they both lost.
The last time I "lost" an (online) argument it was about a gameplay mechanic that I was 99% sure about, but it turned out that the guide I had been using made some false assumptions, which might have ruined a challenge run I had done at the time. Now I know how that gameplay mechanic actually works, the challenge run went well, and both sides "won" in a way.
... also, I usually abandon arguments altogether if the other person is clearly not even willing to listen (like pedaling back to already explained / solved parts of the argument or outright ignoring proposed solutions, etc.). If it is a "me VS you" situation instead of "me and you VS the problem", then it is not worth investing time and energy into arguing as it will not lead to meaningful progress either way.
I never "lose", I learn from the debate and improve myself.
It's ok to be wrong, strong opinions weakly held. Soon as I have verifible evidence I change. Then I think about how I got into a position with bad data.