Heroes VII

Does anyone who knows about hardware think it's really that bad?

The problem isn't so much the hardware as it is the poor optimization. Considering that the game, unlike the one in Heroes of Might and Magic 6, uses the Unreal Engine 3, which is almost 10 years old (although updates were released, but major changes were only brought by the newer Unreal Engine 4). The engine itself is quite good and has proven itself well; you can find a list of games that use it on the wiki. About 90% of them are shooters and action games, but the latest X-COM is also on the list, for example.
The situation is reminiscent of the release of Might and Magic X, from the same developers. Back then, the game also managed to lag on fairly good systems (although the engine was Unity 4, which was known for its sluggishness). But in the end, they were able to fix it with patches.
What bothers me more is the lack of a unified style in the graphic design. The interface design isn't very good, the models are mismatched, and the game's color palette is bland and blurry... In my opinion, the much-maligned Heroes of Might and Magic 6 was better in this regard; it had a noticeable style, but they won't fix it now, except perhaps with mods.