The sway in the scope is almost literally the only challenge in this game, and even that is already undermined with how there is an identical sway pattern during hold breath that never changes. Pick a gun with better stats that doesn't sway so much if you can't aim with it.

The alternative method to impact accuracy instead of heavy sway is heavy variance in aim even if the scope doesn't sway at all- Meaning even if you're aiming right on point it could hit a mile off from where you're aiming. And frankly, I prefer having the heavy sway because I can compensate for that, I can't compensate for ♥♥♥♥♥♥♥♥ RNG.

Zoom in less(It's less obvious with less zoom, and easier to maintain control over it at 4x as compared to 12x), Take lower stances (crouch, prone), pick a better gun, pick perks that reduce the sway, etc.

The character holds the guns absurdly steady all things considered, but yes, they should have bipods and tripods anyway

A feature that lets you start aiming with very low sway, but the longer you aim the sway gets more would be realistic. Just an idea.