Magento vs opencart?

I only know Magento and, in my opinion, it is a pile of senile elephant turds...
I've switched to Craft Commerce.

Craft

What’s craft now.

Last time i used an e-commerce framework, was OpenCart and OSCommerce, although osCommerce doesn't look like it's been updated in a while.

Laraval if you feel you can do the heavy work, I've heard good things about Aimeos, or ZenCart if you don't mind a slow website - but that's not the ideal situation for ecommerce.

I found only opencart having a complete proper REST API with a nice documentation.

I searched for magento rest api, but its doc is in such a way it felt all Greek to me. I don’t know is it just me or is it actually like that...

Same for WooCommerce

And if you’re planning on a multi vendor platform then there’s nothing in API.

@scout In CraftCMS you have a built-in GraphQL API for headless.
https://docs.craftcms.com/v3/...

but the Craft Commerce Plugin is not ready for headless mode. All shop functions are exposable though, if you are familiar with how Controllers and Actions in Yii/Craft work.

As far as I know there is no multi-vendor support.