No, you shouldn't have to "learn to live" with the engine dying at idle, nor is that a good thing. Have you flown the plane yet? If not, you'll want the engine to be able to run for extended period of times as you need to chop the throttle for landing approach. If it keeps dying, then you'll be doing a lot of deadsticking. If you can't get the engine to run at low idle with the throttle down, for a quick fix, add some trim to the throttle channel until the engine does run smoothly at idle. However, you do want the engine to idle smoothly but also at a low rpm for landing. If the engine doesn't run smoothly unless the rpms are up, you setting up for disaster on landings. I had to adjust the control rod on the throttle on my NexStar this weekend since it got colder out, the engine isn't idling quite right to I had to adjust accordingly. Thing is, I moved it too far, and the first landing attempt I tried the plane was a bit too hot with the engine at idle, so I had to put some trim into the throttle to slow it down a bit and lower the idle. There definitely is a balance there. If you can't get the engine to idle smoothly at all at low rpm, you might need to take a look at the engine itself.