I just used the data available in Wikipedia. Instead, if we go to official data from Argentina's INDEC (national institute of statistics) we get a more reliable picture. Here [1] we see they show annual GDP (called PIB in Spanish) in constant prices of 2004 (so, they correct it by inflation). In page 6 you can see this image [2], where you see that yes, GDP hasn't really grown at all since 2011 (which is more than a decade ago). And this is aggregate GDP, but population has grown, so GDP per capita has gone down.

[1] https://www.indec.gob.ar/uploads/informesdeprensa/pib_06_242... [2] https://i.imgur.com/f0pIiFE.png