Population growth is not the main cause of unemployment because as population increases, demand also increases and thus requires greater supply. But the problem is that the uneven distribution of population among countries and the poor governance of many governments, coupled with the greed and selfishness of the great powers, have caused an imbalance between supply and demand in the world.
I mean, people who are pessimistic are not being one because they haven't seen anything, this isn't his first term in office, he has ruled this nation for four years before, and people saw what he did.
So it is not really a shocking thing, we are not really going to "wait and see" something new, we know what he did, we have seen him be a president, and the only way people would be pleased would be if he suddenly became a totally different person during this four years he wasn't the president. Which I doubt happened, he is who he is and he won the elections for being who he is, so he is going to keep doing exactly what he thinks worked so far to put him in office.
Not that he was a good candidate, but because Kamala was a terrible one, so he knows that he has the office, and he has the VP, and he has the senate and he has the congress and he has the SCOTUS all with him, I do not remember when was the last time this happened to be fair, so it is going to be quite shocking to see him getting better, he will probably be even worse. Because of that, after he was a terrible president, people elected Biden, a democrat, then he was terrible too so they picked Trump back, so they will pick a democrat next, then a republican, and each will be terrible.