Have you ever thought devices become old as time passes? and when that device becomes old, it starts slacking when it tries running modern games? You must be really smart.
It's your device's problem, not the devs. If you decide to use a potato to run Tanktastic, then don't expect good results, rather than a boiled potato.
Now I want mashed potatoes.
See what you did Randy? x)
I do agree though, if you run a high-end game on an obsolete device, do you really think it's going to go well for you?