Yes, capitalism leads to major inequality. Other options are out there but also lead to major inequality.

The problem is that other options are not being explored. In the past 200 years (in the western world), pretty much nothing apart from Capitalism has been tried, very few small-scale experiments or anything but even then its for policies such as UBI.

So yes, if you look at poorer regions of the world which are often the only ones trying new things out, you often do see inequality increase but maybe it has something to do with them being poorer regions and all the baggage that comes with it (say, corruption or coups or authoritarianism)? Maybe this also influences the kind of ideologies that get adopted by the ruling class, and how the countries under the new ideology are being ran?

Also, at least in my opinion, this kind of mindset of "this is how the world works so you shouldn't care and live life" feels misguided. I do agree that LARPing on the internet about these things is kind of counter-productive as you're not really achieving any real change, but turning blind eye to injustices happening in your country (or in the world to a lesser extent) is even worse - an ignorance-based call to inaction.