Why were Andrew Jackson and his supporters angry about the results of the Presidential election of 1824?
1) the candidates did not do enough campaigning so the people were uniformed
2) There was a belief that widespread fraud had occurred
3) People who weren't eligible to vote somehow managed to cast ballets
4) It was believed that a political deal had been struck in Congress, where the election was ultimately decided

In the presidential elections of 1824, Andrew Jackson was the most voted candidate and the one who obtained the most votes according to the popular vote.

But the voters had to vote in the election of 1825, according to the 12th amendment, to one of the 3 candidates that greater electors would have obtained.

The 3 candidates with the possibility of being elected by the electoral college were Andrew Jackson, John Quincy Adams and William H. Crawford. The electors on the part of Henry Clay, who had been in fourth place, gave their vote to John Quincy Adams, making him win the election and be proclaimed president.

Immediately after taking office, Adams proclaimed Clay as Secretary of State, positioning him as his most likely successor.

This situation outraged Jackson and his followers and led a fierce opposition during the Adams mandate. When finalizing the same one, it appeared and it gained the following elections and was proclaimed president in the election of 1828.