The pavement surely is half the person walking one way and half the other?
Here's where your fundamental misconception comes in, Mr Soft.
The pavement is just pavement. It's non-allocated space.
So if people coming one way want to take up the whole width of it, strictly speaking they aren't doing anything wrong by doing that. There isn't any law that says, budge over a bit and give the other guy half of it.
You need to realign your conceptions with reality rather than trying to adjust reality to meet your perceived needs.
And no one was forcing you into the road either. Stop pretending you had to go into the road. You could simply have ground to a halt (inconvenient for a runner, I know. All those seconds down the drain) and waited for the obstructors to pass you by, as eventually they were likely to do.