This-exactly. The different rules regarding the states were known to the candidates at the time they signed on to run and it is the candidate’s job to navigate and read up on the different rules and primaries, caucuses, ect of each state, either the candidate or those running his/her campaign. Now maybe those rules of certain states aren’t great rules, but they were there already and nobody “stole” any delegates.
There were some states, such as Florida, where Trump won 100% of the delegates with less than 50% of the vote( I think 40% something or even less?) Was that fair to the others? No ,but it is the way Florida does things.
Also, this business about getting rid of the Electoral College being put out by some Trump supporters, and only going by popular vote- that would insure only densely populated states such as California or New York would win the elections, and the small, or sparsely populated states would have no say. Just sayin"