I’ve been working in the last few years of getting rid of big tech services. PayPal and Amazon are left. I’ve been questioning the need for PayPal in a world of virtual credit cards. My main reason for using it was security of purchase but I feel this need is no longer there. BTW, equivalent EU service to PayPal that is equally well accepted? Feels like this one may be more difficult to satisfy.
I’ve been happy not using Amazon since 2010!
For paper books, find a good local bookstore first. Then for online ordering, bookshop is good. B&N is iffy ethically - they helped crush a lot of smaller stores in the 90’s, but they aren’t part of the current tech giant oligarchy either. Target will usually have a section of best-sellers. If you have to buy from a big store, maybe offset it ethically by donating to a library.
For ebooks, Bookshop is good! They point out which of their ebooks have DRM and which don’t. For some cases, you can also buy books directly from the publisher - these basically never have DRM in my experience. I mainly experience this with technical books and tabletop RPG books.