You can put Pcbnew / Route / Interactive Router Settings back to what they were, which goes back to 45 degree mode, and then you can use the g shortcut key to grab a corner and move it around in any angle mode.
But beware that when you bump into such angled settings while routing another track with the interactive router, it tends to re-route that other track to make room for what you’re currently drawing, and it puts it back in 45 degree mode.