is there any point in voting?

Presidential elections ARE determined by the popular vote. There is the electoral college, but they exercise no independent judgment. They vote how the people tell them to vote. California "always" goes Democratic because the majority of the people there continue to vote for Democratic presidential candidates.

You should vote because your voice should be heard. If you're unhappy with the system not voting isn't going to change anything. In fact, the establishment politicians who you're disatisfied with are counting on people like you not voting so that they get to stay in power.

The only time in recent history when the person elected president didn't get the most votes was in 2000, when, after a long drawn out process, the Supreme Court put Bush in office although Gore got the most votes. Most of the time, the electoral college corresponds to the popular vote.
It's ridiculous to say that California goes democrat "no matter what the people want". If the majority of the population of California voted for a Republican candidate, then that's where the electoral college votes would go.

the point in voting is to get the right person voted in for the job

I'm sorry you don't understand how the system works. You don't actually vote for the candidate, you vote for the Electors that are pledged to the candidate. The party selects the Electors and makes sure they are people who will keep the pledge.

You should read a little more about the electoral college:
https://www.archives.gov/federal-register/electoral-college/print_friendly.html?page=faq_content.html&title=U.%20S.%20Electoral%20College%3A%20Frequently%20Asked%20Questions

Yes, it's the Electoral College that determines the winner of the presidential campaign. But the College depends on the individual votes for the candidates. What this means is that independents (not just one of the two main parties) can become president. It's a convoluted way of making the decision, but each state, that way, has a proportional effect on the final result.

Yes, when one takes the "popular vote" -- the number of votes over the whole USA -- alone, it can look like the winner actually lost the election, but what it means is that the winner won a larger proportion of the states. This give states like California an apparent larger effect, and some states very little effect.

SO, back to your question: what's the point of voting in the elections?

Your vote can make a difference, a tiny difference, but still a difference. Even if the vote is for the loser, it still counts. Otherwise, why bother with elections?

There is a selfish, practical benefit for you in voting: You get the satisfaction of refusing to consent to bad candidates, even if they end up winning.

For example, I will vote for none of the mainstream Republicans nor Democrats, with the possible exception of Bernie Sanders. Normally I cast a protest vote for any minor party candidate available (Libertarian, Green, Peace and Freedom, whatever); I've voted this way in every election except my first one.

If I vote for somebody who's bought/corrupted by special interests, like today's major candidates are, then I would be partly to blame for all the bad government actions (torture/murder in Latin America, policies that lead to our economic crises) that result from that influence.

Non-voters are blameworthy, because they acquiesce to what voters choose. They could actively deny consent by voting for any candidate who refuses special interest money.

It's capitulation like that which what allowed Obama to continue as president, beating out Romney. Thanks a lot.