Doping will continue to be rampant in all sports that can benefit from the use of PED. The organizations in charge of each sport are in charge of anti-doping testing; a clear conflict of interest. They can't both market the sport and it's top players and police it. There is too much money at stake. They will continue their anti-doping facade claiming that their sport is mostly free from PED, "catch" a few scapegoats to demonstrate that their system is working. The only way dopers will be exposed is by disgruntled insiders, with investigations by interested government entities. Clearly, some governments are more interested than others in exposing the truth.
If anti-doping testing management were controlled by a truly independent international outside authority, there might be a chance to clean up sports. Even if the latest designer drugs cannot be detected, the blood and urine samples can be stored for later testing, when detection may become possible. But at least they could attempt to perform the best tests that exist at the best time to attempt to catch the dopers.
But unfortunately, the various sports organizations would never willing give up their current authority to let this happen.
For now, we can only use our own observations to suspect who is using and who is not.
If it walks like a duck, and quacks like a duck, it probably is a duck.