The gameplay in arena is boring, pointless and lame. I don't want to say again for rigged algorithms I think you have heard this a billion times. I stopped playing ranked and I'm going to stop playing play standard. I don't think arena will survive a long time now because people don't want to play something pointless.
My suggestion is to make bot match competing at least.
You can kill the game as you want(it's yours anyway) but do a favor to us which love the game and want to continue playing however as long as this disappointing app still exists.