The Cycle will drop off and then the DX will die off, that is the 11 years solar cycle, nothing can been done about that....mother rules the roost.
It was not a wise choice to put the CB service where it is guaranteed to be subject to propagation.
And as for other countries there is also no way to stop propagation from them either, I am sure that they suffer with the same problems from US stations that we do.
There are probably lots of guys that get fed up with US operators on channel 6, 11, 19, 26, 28 and so on.
This is why many op`s first start using SSB rather than AM mode to help get away.
Next thing that happens is radios get "expanded" for alpha channels, then freeband.
One solution is to study a bit and get your Ham license.
It is easy to pass the Tech License requirements and this will get you on a slice of ten meters, most guys already are running 10 meter radios, or radios that will work in the 10 meter band, and CB antennas work well on ten meters with just some small adjustments.
There is so much room on ten meters it is incredible and can get you away from the congestion found on 11.
Plus the license opens up all other kinds of bands.
73
Jeff