Honestly I don't think there is a good Etsy alternative when it comes to handmade items.
Ebay is okay, but you won't get pushed organically as much, you only use their paid ads so maybe that's for you.
Amazon Handmade might be the most valid alternative but it's harder to set up and costs a monthly basic fee of like $40 and idk about their ad system.
Depending on your product some smaller Etsy alternatives could work out too, fashion products for example.