2015 and under 60k miles - could it be still under warranty?
When you say - boost issues - what do you mean?
Things to check.
First if the previous owner had any modifications on the car.
Then, those symptoms point to: spark plugs (replace them, 40k miles they are ready to go despite what manual says - those have tendency to die prematurely due to very harsh conditions), then fuel - pour higher octane rate petrol, check air filter, and look on the all the pipes after filter all the way to the manifold.
There could be more issues down the line, but those are the easiest to check.