That doesn't justify the excuse to make a bad movie. But I agree with you, Venom isn't a deep character, and a Venom film doesn't need to be the most deep, reverent type of movie. Those who demand an uber serious Venom movie are kidding themselves and it's something a 15 year old would want. You can make it silly in a fun, enjoyable but in a high quality way. This just looks like they took some good attributes of Venom, not essentials, and made them crap.
My problem is they're doing away the essentials. What makes the character to begin with. His connection to Spider-Man. He comes from Spider-Man. Which is... pretty important.