No, the majority of electors are bound by law to vote a certain way based on their state's decision. The electors themselves are manifestly irrelevant to the whole process, and have been for maybe a hundred years.

The real problem of the system is the state based system, where winning a narrow majority in a state is equivalent to winning a landslide, since you get the same amount of power. Also, the fact that different people get different leverage based on whether they live in a smaller or larger state is highly unfair.

The electors themselves have not actually decided an election in a hundred years or more (as in, electors deciding against the official choice of their state). While they legally could, I would bet you however much you want that they would get literally lynched, if not arrested and replaced, if they tried to. For all practical purposes, the USA has a weighted state-based popular vote system, where the president is the one who wins a majority in states with enough weight.

Edit: researching a little bit more, the electors have never changed the result of the presidential election. The closest they ever came was in 1836 when enough electors ignored their state's vote for vice-president, and still the VP who won the by-state popular vote got elected later in congress. The president was separate and won the electoral college per the popular vote as normal.

So, this concept that electors serve some purpose to safeguard democracy from populism is a pure fantasy. It may be a fantasy that the founders shared, but it has never panned out in reality.