I was getting some hate on my t-shirt designs because they are simple. I made them that way because i am actually making this myself by hand. And cutting stencils out for my ink it hard enough as it is, let alone some hard ass design....
May rethink the bitcoin integration.
Don't just give up like that just because some people hates your design.
Try to marketing your online shop into your local country first, make some proof that people loves your design and buy your t-shirt.
And start selling here again

Yeah, you're right. The designs are pretty simple. However, they are simple for a reason,lol.
I hand make these.
Here is my process:
1) Design
2) draw out the design
3) stencil the design on a sheet of silk-screen
4) Make frame for screen
5) Ink the shirt(s)
6) let dry, sell, ship etc
I'm thinking about offering some other sort of item, like sculptures, jewelry etc.. Designed to fit bitcoin/crypto in general.
I actually have a Bitcoin watch ( a few designs) however, with btc being so low right now, i don't see anyone willing to spend .6-1.2 for a watch per say.