Some members of Gehlen's group, unknown to him, were spying for Russia, while others moved to Syria and Egypt, and conducted gun trafficking to equip those countries with weapons to use against Israel. The CIA was extremely embarrassed by all of this, and dropped Gehlen and his group like a hot potato. Gehlen eventually wormed his way into becoming President of the BND under Konrad Adenauer, Chancellor of West Germany. Gehlen eventually fell out with Adenauer because his lack of leadership allowed a KGB agent to infiltrate the BND.
Today's CIA is likely as corrupt and incompetent as it was in the 50's and 60's. Even more so, because they don't have to report to anyone, and are held accountable for nothing.
Your first instinct is to blame America for everything, that is pure unthinking blindness and you can’t keep up with events in the world and actually learn, when you have such a simple knee jerk mindset.