I tried the first game recently and visually, storywise and, the most important, atmosphere–wise it's so bland
I find the aesthetics of DD actually to be fantastic and to achieve with flying colors what they are trying to do; they are old DnD, both DD1 and 2. They are very much a love letter to RPGs. The pawns banter, the design of armors, the usage of old english, the down to earth monsters. Calling it bland is missing the point, as it was intentionally created to evoke a feeling of true classic fantasy.
Here is a piece of official artwork done as an homage to DnD.
Just look at some of the promotional in-engine images. These could have perfectly been taken from a RPG's bestiary
Without mentioning the numerous inspirations on classic mythology and art when it came to monster design. Like the fact they gave Cyclops tusk in a nod to the origin of the myth being the discovery of elephants skulls which were mistaken as having a single eye.
As for the plot, both game have big issues with pacing and writing sadly, but DD1 actually pulls off a interesting twist near the endgame that makes the game world far more interesting and re contextualizes the premise of the game, and even links plot elements into game play mechanics. DD2 tries to do the same but it isn't near as effective and it relays in part of having played DD1 to really appreciate them.
Also the expansion of DD1, Dark Arisen, is dripping with dark fantasy atmosphere, one of the reason is one of the most regarded parts of the first game.
DD1 in particular is a game that does take time to show its true value. Is a bit of a meme that the game only starts getting good after the oxcart quest, but there is true in it. I remember back when DD1 released on PS3 I wasn't too impressed at the beginning of the game, but by the end it I end up really liking it. They are kind of niche though, so it is normal if you are not into them.