That´s not what I said, actually. For subjective gigs, it´s not that easy.
You can definitely get your money back if a seller does not deliver at all, or delivers something else than what their gig promises or what you agreed on with them.
Personal taste and dislike again obviously can´t always be a reason to get your money back, because a seller still spent their time on a buyer´s order, even if a buyer is not completely happy with the outcome.
If you don´t like the output, you can ask the seller to modify, perhaps give a better description of what you want, but they might ask you to pay for a revision in that case, depending on how much time it will take them.
If the result is not what was agreed on, objectively, for example, you asked for a logo to incorporate specific colours and the seller chose different colours, or you wanted a minimalist font and the seller used a swirly one, ideally, you´d still ask for a modification/revision, so the seller might come up with what they should have delivered, but if a seller isn´t able to produce what was agreed on, though, you will be able to cancel.
It sounds like a very easy project to me if you find and order from a good seller right away.