Any psychology majors here? Why are 1v1s so much more stressful than team games ?

I've noticed that I get so much more stressed and worked up during 1v1 games than I do team games. Does anyone know what causes this ? Like I know the obvious answer is "because you only have yourself to blame" but I just can't help but feel like there's more to it than that. Like I don't feel like I've ever been that critical of myself during 1v1s and I am equally aware of all the mistakes I make in team games. If anything I would have thought that you should feel more stressed in team games because your mistakes also impact other people as well not just yourself.

So yer was wondering if anyone really knows / understands what makes 1v1s so much more stressful than team games.