In Red Orchestra Ostfront i die to grenades all the time.
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But if serious, then yep, reckless nadespamming in predictable places is annoying and also is gamekiller.
Hope that in ROHOS maps come with more randomness and less predictable situations.
Now if we look at IRL, then there isn't so simple answer.
Here is one pics about german 'sturmgruppe' in summer 1942 in Stalingrad..
And yet one.. Here is text about using grenades in close combat in city (though that wasn't so common, and more for special fighters).
Text is translated, and consequently not very good, but if you know better translator, try it.
During the Second World War employees СМЕРШа (