The problem used to be blamed on aftermarket bulbs in cars not designed for them. But now, completely factory cars have insane, nuclear fusion reactors for headlights. I mostly get blinded by tall trucks and SUVs. Almost all stock headlights.
I improved things a bit by having my rear window tinted as dark as legally allowed. It helps take the edge off the brightness of trucks behind me. Can't really do much about the on-comming traffic.
You might be able to put good bulbs in the fog light position and then aim them...most fog lights I've seem don't project light very far out though.
Depending on what you drive, you might be able to aim your low beams down a bit after installing some LED replacement bulbs. I'll line my car up to a big painted wall to see the bulb projection pattern. This will get my left and right even with each other. Then when you drive, make sure the light is projected under people's rear windows on level ground.