I have never ordered something from Amazon. It was introduced in my country a few years back, but it isn’t really that good of a site (at least the few times I have visited it).
Like many here, I do not want to support a monopolistic company like Amazon. Luckily I live in a country where I have better options. I tend to buy things from plenty of well rated sites. Environmentally conscious sites if I can.
I could see myself buying from them if there genuinely isn’t another option and it is something I really need, but that has yet to happen.
I have been satisfied with beancount. https://github.com/beancount/beancount and fava as a ui. It’s text based so it is easy to automate imports and exports. It can seem daunting at first to create importers in Python, but it’s pretty basic scripting.
Text based accounting lends itself well to easy experimentation with version control.
I tried gnucash for a while, but it felt so slow and not flexible enough for me.