Things that are good about Capitalism:
It allows people ownership over property and their individual labor. These are things people like and that people actively value.
It allows for people to create new enterprises and try to make them work as a business. Some will work. Some will fail. If someone thinks they have a good idea, they're free to try and pursue that idea. (within reason of course, all things have some amount of regulation)
Businesses take inputs (labor, materials, etc.) and leverage them to produce outputs, with the desire to make a profit in the process. This process adds value to the raw inputs when making them into a product or service, which is why in Europe you have the "Value Added Tax". Capitalism encourages people to keep trying to find new ways of providing things to people that they desire. Businesses are ultimately service industries. They exist to serve their customers. If no customers exist, they cease to exist, which is why many businesses will try and pressure regulators to give them a captive market and force them to use it. (And again, this doesn't mean all regulation is bad, we force people to get all sorts of insurance because we know that if we don't force them to, they won't do it because they don't think they'll need it because people are generally very bad judges of many things that they don't understand!)
It allows capital to turn groups against one another, in order to prevent class solidarity from forming. Why do you think the Koch brothers support so many vile, socially regressive policies and politicians? Because they know that racism, homophobia and other forms of discrimination keep people in line and allow them to be as powerful as they are. Not that capitalism invented those forms of discrimination, of course not, but under capitalism the most powerful people in our society are directly incentivized to promote them.
The unholy alliance of Big Business and Social Conservatism is very much a thing, but you misunderstand why this occurs. This is not about class solidarity- that's already impossible
because many of the working class won't ally with minorities because they're just straight up racist and actively want to have some form of dominance over others. White Union labor was never a source of enlightened tolerance, but they voted Dem due to the support they got from their elected officials. The combination of Civil Rights passing, globalization weakening their negotiating positions and Reagan further weakening those positions led to the slow exodus of the White Working Class from the Democratic party. Not the working class as a whole though- the Black/Hispanic/etc. working classes stayed put!
The reason the alliance exists is because without it, there is not a majority in favor of Right-Wing economic policies. Therefore in order to enact said policies, they have to draw the battle lines on social issues instead of economic ones, because it's the only way to get a coalition large enough to win. Using the US as an example.
https://www.voterstudygroup.org/publications/2016-elections/political-divisions-in-2016-and-beyond
- Liberal (44.6 percent): Lower left, liberal on both economic and identity issues
- Populist (28.9 percent): Upper left, liberal on economic issues, conservative on identity issues
- Conservative (22.7 percent): Upper right, conservative on both economic and identity issues
- Libertarian (3.8 percent): Lower right, conservative on economics, liberal on identity issues
If you govern primarily on right wing economics as a Republican, you will lose. You can't capture enough of the voters to win. This is why Trump, during the campaign, governed as a Le Pen-type, promising to "drain the swamp", feigning support of liberal economic social policies, and other blatant BS. This falsehood, alongside the racism, allowed him to win "populist" votes. Which are predominantly white and rural, and overrepresented in value in the US political system. (A reason Obama hammered Clinton on NAFTA during the primaries despite not actually being against free trade.) And it's thus this specific flip-flop in office, governing as a standard republican, which is most likely to hurt him.
The thing is- this tactic of using social conservatism to accrue power and leverage it? It's
hardly unique to "capitalism." Many people are just assholes.