Why do people know that C.I.A help bring the Shah to power but don't know the Soviet and British overthrow his father?

Why do people know that C.I.A help bring the Shah (Mohammad Reza Pahlavi) to power in 1953;however,most don't know that Soviet Union and British overthrow his father(Reza Khan)in 1941?
The Shah father got overthrow because he was too close to Germany and Iran's oil was very important in war effort particularly for Soviet Union although British oil company(today BP) that owned or ran the oil industry in Iran.
In 1953 the cold war was front and centered,the monarchy in Iran since force abdication of Reza Khan in 1941 was weak,parliament ran the show and the Prime Minister Mosaddegh was too close to the Soviet Union.So C.I.A, and operation was headed by Theodore Roosevelt grandson,seek to power back in hands of Monarchy,hence,overthrowing Mosaddegh government.
The Shah despite public image,went on thirty year campaign to improve life in Iran,including increasing education,giving land to the poor,modernizing the country,but because he was Pro-American he never got credit for his good works and evil force back by the Left-wing phonies around world come to power.