Yes.. grenades are good for rookies for getting that one critical hit and kill because even with 90%+ chance of hitting you're still able to miss and in return lose a soldier.
As soon as you have researched your first armor and advanced gun grenades beside smoke (which is rather an ability) are useless because you won't kill anything with it as the opposition gets stronger and more resilient.
As soon as you have researched your first armor and advanced gun grenades beside smoke (which is rather an ability) are useless because you won't kill anything with it as the opposition gets stronger and more resilient.