I want to start with piracy. You won’t be able to combat piracy directly. The best way to deal with piracy is offer things you can only get by paying. I don’t mean create a cash shop in the game. What I mean is that certain things cannot be had with a pirate copy. Steam achievements and card drops are a great example of this I think. If you launch on steam make sure to take advantage of the platform specific features that will not be accessible in the pirate versions. A pirate steam game cannot access any of the extra stuff steam offers in most cases so use it to your advantage to get more people to pay so they can have access to those things.
Ok so technical failure? Dude you made 2Gs from a game you put out there. To me a couple extra thousand bucks is no failure. I once listened to a guy talk about how a game he launched wasn’t really successful until years after the launch. I can’t remember exactly what it was that ended up changing but it wasn’t much the game basically didn’t gain traction until long after the release though. Never simply give up on or toss out any title that isn’t selling like hotcakes within the first couple months it may take time but the title may end up making you a lot of cash. I think that guy said he made around 90k on that title most of which didn’t happen until like 5 or 6 years after the release when it suddenly gained popularity.
It is great that you got a game launched and earned something from it. Just going through the process once is an important step to getting good at putting successful titles out there. Read the reviews see what people did or did not like and be careful about weeding out useless reviews from ones that provide real feedback on the game. You say your focus is more on art and not technical I suggest trying to find someone who can help you on the technical end. When you make cash from a game like the current one use the loot to hire a programmer to help on the next title. Once you have someone who can help you can get another title up and in better shape. If that one does better you now have cash to continue paying the programmer and if you are lucky maybe enough to go bigger on the next game or hire additional help such as a musician to do some original audio.