Oh that’s good to know, I had no idea that designs can be deemed too generic. Could still put them in your shop when that happens?
Maybe it’s possible to incorporate pre made design packs into your own design so it’s a bit more different.
I’m glad I bought the Photoshop program years ago so I don’t have to bother with subscriptions. I taught myself Photoshop, I just googled what I needed to know and searched youtube and followed along. At first I had to google how to select something in Photoshop and the thought of different layers did my head in, now 20 or more layers wouldn’t bother me at all. It’s amazing how far you can come. There are some good free alternatives to Photoshop too and you can alter photos and make them more appropriate for being on tshirts. It’s a lot of fun to muck around with but it can waste a lot of time too. 
Are there more tshirt product options available in Marketplace than in Spreadshop? I think I need to much around a bit more in there soon!! I think they give us some great options anyway which is exciting. 