Regarding your original phrase, "venom 2 mongol heleer shuud uzeh best," I assume you're referring to a Mongolian dub of the film. Unfortunately, I couldn't find any information on an official Mongolian dub of Venom: Let There Be Carnage.
The introduction of Carnage adds a new layer of complexity to the story, as Venom and Carnage have a long history in the comics. The film's portrayal of Carnage, with Andy Serkis's performance, brings a menacing and unsettling presence to the screen.
Venom: Let There Be Carnage received mixed reviews from critics, with praise for its action sequences and performances but criticism for its plot and pacing. Despite this, the film was a commercial success, grossing over $790 million worldwide.