Also 14 days? I don't know of any refund policy is that short.
So, for the 14 day refund window, both Epic game store and Sony game store only offer 14 day refunds. It looks like Microsoft/Xbox is the same as their software refund policy for their other platforms and that 30 days. GOG's policy is 30 days.
Itch.io (by far the samllest of these game shops) has a 7 day return window from what I could find.
Probably, most retailers will write it off and move on just so you leave them alone
This is exactly why most retailers don't do this and why the window exists in the first place. People take advantage of that window and any other favorable terms to the point where we end up where we are now. Your statement also suggests to me that you know what you're asking might not be reasonable but you've decided to be angry about it instead of accepting that your actions lead to this outcome.
But then, here's another question. Did you ask the developer for a refund? Because if it were important enough to me to be irritated about I'd exhaust all avenues before giving up.
You claim you had to Google how to get a refund. Your email receipt has a hyperlink directly in the text to take you to their refund page making it one of the easiest ways to get a refund in all honesty.
Steam even say they will consider a refund outside the refund window if you contact them (which is probably why other people are asking for more information or if you've left anything out). You even admit in another comment that you should have requested a refund at a specific earlier time, which suggests that you had the opportunity and did not.
All of this to say, no retailer is your friend, and every retailer will have tradeoffs. Basing your entire purchasing decision on an irritation that's at least partially your fault is interesting. Here's hoping GOG gets your business instead I guess.