Depth of field and angle: Look at your angle, look at theirs. Everybody else is shooting straight on, directly square at the subject. You're shooting from above, at an oblique angle. That's going to place your depth of field, especially with a bigger aperture like f/1.8, at a plane that only gets the noodles on the chopsticks and the front of the bowl in focus. If you were shooting square on, all the noodles would be in focus, though the bowl may not be. There are reasons the most common food shot angles you'll see are directly overhead, or square-on.
Aperture and (possibly) lens. You also need to learn not to shoot wide open all the time, so that you get enough DoF to cover your subject, and you can increase the sharpness of your lens. The Canon EF 50mm f/1.8 is notorious for being soft wide open and sharpens up considerably by f/4. But I will also note that macro lenses can typically achieve better close focus, and are always going to be the sharpest lenses in any lineup.
Lighting. While the first and third of the shots you want to emulate may well be done in natural light, the ice cream sundae one could be lit with a off-camera lighting gear and a modifier for the soft light, like a softbox. This gives the photographer the ability to use low ISO with smaller aperture settings.
Background, styling. Background gives ambiance and context to each of the images: a restaurant, a party, a street stand. Your shot? No context. And also strong enough graphical elements to fight for attention with your bowl of noodles. And the ramen, while I'm sure it was delicious, doesn't have the type of styling to make it look delicious. Someone else already having tucked into a dish isn't necessarily as appealing as the dish presented to you by the waiter, not yet eaten. Again, note how the shots you want to emulate are pre-consumption, not mid-consumption. But more than that, the spoon, chopsticks, bowl, bowl logo, and ramen bowl toppings could have been used as graphic elements before you mixed things up.
On the plus side, your light was good (that slightly high key look is spot on), and your white balance is terrific. Those are typically the two things food photography beginners get wrong.