Adult content on an international scale is REALLY tough. I'm not a bit surprised there are problems.
If you're at all familiar with the issues of building a public-facing business on adult content, you know that there are entire industries (hint: VISA credit card processing) that will categorically refuse to let you be in that business at all, or to deal with you if you're facilitating it. Patreon must maintain working relationships with VISA.
There are countries in which it is a criminal act to expose the belly. Patreon attempts to operate internationally, which means the content creators they enable become part of a negotiation where countries like that are at risk of demanding Patreon get rid of ALL 'criminal' creators or be refused permission to operate in the country.
Adult content is a hell of a can of worms. To facilitate it at ALL at this scale is impressive. And the issues we run into are not coming from inside the Patreon-like company: if anything, their scale helps them negotiate terms. It's the credit card companies, the restrictive countries, which are setting the terms, and what Patreon facilitates is already an impressive feat within the context of what you can get away with anywhere else.
Seriously, if you're casting aspersions at Patreon over handling of adult-content creators, first try to make a dildo company and then negotiate being able to accept direct payments through VISA :)
(disclaimer: I have not actually made a dildo company and then tried to negotiate being able to accept direct payments through VISA)