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No it doesn't. Sites like Github and Patreon can pick and choose which cryptocurrencies they want to support just like they choose which payment processors they support. And creators can choose to take donations directly today using whatever payment processor they choose, but creators and donors choose to use the middlemen because they provide value.

Cryptocurrency doesn't change any of those factors, it just makes processing fees and currency instability orders of magnitudes higher.

Why use a payment processor at all for crypto? The whole point of crypto is that you can do it yourself, without requiring permission from the rent-seeking banks. The fees are not that great for many of them. For Monero, which is the most commonly used privacy coin and probably most commonly used for illegal transactions nowadays, it's under 0.01% for most transactions.

maybe the problem is github...how about that ?

Except it doesn’t, otherwise people would be already using it. Everyone knows about crypto, its not like it needs marketing.

You only need to pay a $10 transaction fee.