The Electoral College is a flawed system in the United States. On a couple occasions, it has people who lost the national vote win the election because they won the electoral college. I find that a national popular vote would be way more democratic than the electoral college as it guarantees the president and vice president will win the majority of the people's votes. As well, in the electoral college, one person in one state's vote wouldn't be worth the same as a vote from a person from another state. I believe in one person one vote and how electoral votes are distributed, presidential elections don't seem like one person one vote. As well, states that  typically vote heavily democrat or heavily republican could reduce turnout of people from that state who oppose it because it seems like their vote won't effect the outcome.  Also, every state doesn't have the exact same rules on faithless electors (an elector who votes for someone who didn't win their state's majority). A popular vote would get rid of the risk of faithless electors and make everyone's votes equal and could possibly improve the voter turnout.

Another reason why I don't like the electoral college is that we don't use it for anything else. For electing governors,Congress, and Mayors, we use the popular vote. Also that other countries don't use an electoral college. The USA's presidential election is about the only election in the world to use an electoral college. State and Local elections plus elections for Congress seem to elect fairly and it seems an electoral college for governor or for Congress isn't something people are campaigning for unlike abolishing the electoral college at the national level.

Abolishing the electoral college with a national popular vote would make the United States more democratic. If you say the United States is supposed to be a republic and not a democracy, well, republics have democratic elements, as we vote for the people who represent us in a republic, and we would still be a republic if we still have the office of President and Vice President alongside Congress with our governors and state Congresses. 

Also, if you say the founding founders had put it in there and it's bad to say they're wrong. Well, they put a way to amend the constitution because they knew times would change and what they put in there over 200 years ago wouldn't always fit the country. The country now is much different than what the country was in the late 1700s. I say they're right that what fitted back then might not fit the standards of today.

There are two Mr. Beat Videos about abolishing the Electoral College and I would like to end on them as extra information and he could explain it better than I will. 

https://www.youtube.com/watch?v=s6HFdSCDq48

https://www.youtube.com/watch?v=6kWF2Rhxx-c&t=2s 

Here's a SGP Gray video on the topic: https://www.youtube.com/watch?v=7wC42HgLA4k