Windows 10 Paint and the Line tool

I've used Paint in previous versions of Windows because it was very quick and very easy. Since switching to windows 10 I'm not seeing a lot of either.

I don't seem to be able to find any useful information on the program itself as most queries direct me here:

I'm looking for a way to draw lines that will not move when I attempt to continue drawing to another point.

Example:
Drawing an open sided triangle from point A to B to C.

This should (and used to) be a simple process of:
-click A drag to B
-let go
-click again at B and drag to C

Now attempting to do so will only result in a line connecting A and C, so it's necessary to do the following.:

-click A drag to B
-click far away from line to deselect and avoid dragging it again
-bring cursor back to B and try to line it up with the same point again
-click again at B and drag to C

When trying to work with thin lines it can be difficult for those who have a level of visual impairment to get those lines to be spot on again.  (For the purposes of this exercise I've used larger thickness lines in my image.)
If trying to fill afterwards this can result in a mess and mean going back with the zoom to inspect every line connection point.

Even AutoCAD has an easier functioning line tool than this new version of paint right now.

Is there a hotkey to quickly deselect the line so I can continue on to the next line without having to move the cursor away?