Kraven was what I would call a good holiday action film that probably didn't get a good chance. I have no idea why it seems every Marvel associated movie is getting the fan negativity treatment. Not every movie will be a triple A Endgame film. Kraven was a secondary character at best in the comics so I think you have to set your expectations appropriately. I hope that the movie does well on streaming and physical sales. I would have liked to see how the story arc would have gone in future films but unfortunately it probably won't get a sequel.
My advice to anyone watching movies these days is go see it yourself and don't believe the charged reviews.
I thought the story was good, the acting was fine and the special effects were done well and more grounded and gritty than your normal super hero movies. Kraven was another antihero type in this film and I think that worked well for his introduction.
Another point is like many comic book movies, this wasn't necessarily true to the comics but I enjoyed the character and story nonetheless.