Lets give the government some more power so it can supply all our basic needs

Socialism is such a butchered term. It's so often misused. Bernie Sanders says he a socialist because he wants to publicly fund colleges, publicly fund health care, etc. That's not socialism. That is a social democracy. Socialism is a range of economic and social systems characterized by social ownership and democratic control of the means of production. An example of socialism would be a society in where the workers own and democratically control the enterprise where they work.

I will never understand how anyone could promote a system that literally enslaves them rather than a system that attempts to provide freedom and opportunity.

That is exactly what capitalist are doing, enslaving people. A capitalist buys raw materials and the workers use their labor to transform those raw materials into something of value. The workers produce the value, yet the capitalists get to keep it. The capitalist pays the worker but of course, he doesn't pay them for the actual value they produce. Otherwise, he would have no profit left for himself. So in a capitalist system, capitalists get rich by exploiting the worker. The worker produces value but only receives a fraction of the value that he produces and the capitalist keeps the rest for himself. While at work you're also subject to what your employer tells you to do or else... You have no say in how things are run, your employer says it's to be done this way and you better follow.

It's comparable to slave society, where the masters get the slaves to produce things that the masters keep for themselves. There are a couple differences in a capitalist society. There is the illusion of choice. You often hear capitalist apologists say nobody is forcing you to work for X but in reality, you either work for X or you starve. That's not much of a choice. Second, your master only has dictatorial power over you for typically 8 hours a day so it's only temporary. In our current society you have basic worker rights so your employer can't force you to do certain things, like unsafe labor, but in a true capitalist system workers would have no such rights. It's often referred to wage slavery to distinguish it from other forms of slavery but it's very similar.

In a socialist society, the workplace is run via democracy so you're not subject to some dictatorial figure that tells you what and how you're to do things. Also, since you own the workplace you also get to keep to the surplus value that you produce. There would no longer be a capitalist class to exploit and enslave the workers.