What caused the game's sales failure?

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In this thread, I would like to discuss with everyone why Lionheart never became a hit. After all, with such a wonderful role-playing system as S.P.E.C.I.A.L. (of course, it underwent changes related to the transition to the medieval setting and the introduction of magic, but overall it retained all its advantages — immense freedom of choice in character development and a complete absence of classes), a well-developed nonlinear plot, and an amazing world with an alternative history, the game had every chance to become one of the pillars of the genre.

Who is to blame? Reflexive Entertainment or Black Isle (who, according to the documents, appeared only as consultants)? The unpolished interface or the engine shortcomings that reduced all battles to a meat grinder in the style of Diablo? The too-high expectations placed on the game or the rush in development leading to the overall rawness of the game?

I want to finally get to the bottom of this issue. I look forward to your opinions.