I used to have a decent espresso machine at home, and try , from time to time, supposedly "barista quality" espressos from cafes around here.
I agree wholeheartedly with those who say the coffee beans, the grinder and the barista are more important than the machine.
Nowadays at home I use a very simple Bialetti Brikka with exactly 200 ml of water and 20 g of coffee. God shots every single time.
Interesting, IME it's all beans. At my go-to place, the baristas are pretty bad but the two owners are super dedicated to roasting their own beans, you can always see them putting a lot of time and effort into it. Result is much better than places where the baristas are skilled but they use cheap pre-roasted bulk beans.
To take it to an extreme, I doubt the best barista in the world is going to get a good shot out of the default Starbucks beans. But maybe I'm wrong!
That can't really be called a shot anymore tho, you're not even in a lungo territory if you're pulling a 200ml shot.
Or do you mean an Americano? Are you adding water afterwards?
That's not espresso though. It makes good coffee, sure, but so does an Aeropress, they're not really comparable when one wants a true espresso.