What was the effect of rotten boroughs on the democratic process in England?

Rotten or pocket boroughs destroys the democratic process of electing members to the House of Commons. People who get to vote are corrupted with bribery of a "patron". The Patron decides whom to vote.

Mainly because the people that had the chance to elect are bribed by a "patron". It doesn't follow the will of the majority but they are corrupted with money to choose those that are running for parliament.