Something about Paddle that I can't define is putting me off, whether it is website, wording, attitude, "contact me for the quote" and such things makes it feel old school and bureaucratic. I learned over time to listen to my gut feeling, so I'm not gonna use it.

Gumroad looks much more relaxed, although more expensive and lacks many features.

Here in this thread, someone mentioned https://www.getrevin.com, which lets you use Stripe and provides a tax shield merchant of record for 1% on top of Stripe fees, which makes it interesting.

I also found out https://www.lemonsqueezy.com which is priced similarly to Gumroad, but it lacks documentation to be able to compare it.