What I've come to realize is that MSG-based seasonings* -- be it Aromat, liquid Maggi sauce, regular bouillon cubes, or Ajinomoto in Asia -- are often used by amateur cooks who simply don't know how to actually give food flavor.
How do I know? I used to be one. As my cooking skills have improved over the years, I've been able to nearly eliminate all those things from my cooking. (I do confess, I still use MSG-free bouillon from Coop -- or from Trader Joe's back in USA. And I still use the MSG-laden Korean beef and anchovy bouillons, simply for lack of a practical alternative for quick weekday cooking.)
But for most other stuff, it's just been learning how to season with real seasonings -- salts, acids (real Orleans-method vinegars, citrus juices, tamarind, wine, tomato, etc), fresh aromatics (garlic, onions, shallots, scallions, etc; ginger, lemongrass, galanga, chiles, etc), and quality spices (freshly mortar-ground pepper, cumin, etc). And of course fresh herbs when they help (fresh oregano is no better than dried, but fresh parsley, cilantro and sage are revelations). Judicious use of tasty spirits is awesome, too (try sauteeing mushrooms over high heat, add some shallots, and then deglaze with whiskey. Oh. my. god. is that good!).
Combine this with proper methods (like knowing how to properly brown meat or sear vegetables), and you can make awesome stuff without the junk. No Aromat or bouillon cubes needed. (My friends all call me a great cook, so I guess it's working!)
The downside is that it takes longer than convenience foods. But our pre-1900 ancestors had no convenience foods, and they got along just dandy, didn't they?
*What the MSG gives is the elusive umami . This is also -- IMHO better -- achieved with umami-heavy seasonings that derive flavor from fermented protein: soy sauce, fish sauce, anchovies, etc.