Your brother is on a (specifically designed and heavily funded) pipeline to being a total piece of shit (not just with misogyny, but racism, and probably queerphobia and ableism too), do what you can to get him off it. A quick search brings up what looks to be some good info to start you off:

Manosphere

Misogynistic influencers are trending right now. Defusing their message is a complex task

De-radicalising incels out of the ‘manosphere’ through Reddit

Making a Radical Misogynist: How Online Social Engagement with the Manosphere Influences Traits of Radicalization

Swallowing and spitting out the red pill: young men, vulnerability, and radicalization pathways in the manosphere

Exiting the Manosphere

There are also many youtube videos on the subject, though I haven’t watched any recently, so I won’t link, but look up something along the lines of “manosphere right wing pipeline” and you should see some results.

If you’re really asking what it means, an Alpha is a

pseudo scientific myth that has been twisted and then adopted almost exclusively by toxic men to try and boost their own ego and justify their shit behaviour

FTFY

And you’re telling everyone here that you are an ableist… ¯\_(ツ)_/¯

Don’t forget:

Those politicians who are in a position to pass laws with regards to my taxes, income level, and other means of hoarding power? Oh, they’re owned by me thanks to legal bribery.

And those other politicians who want to introduce a maximum wage, higher taxes, or anything remotely socialist? Oh, the media outlet/s I own, along with the politicians I’ve already paid off can easily smear them out of contention.

Both possible because the system is what it does and is designed to encourage these kinds of disparity and inequality, not combat it.