I'm reading another comic that stars a grumpy polar bear, Sach's Harbour, which can be found at:https://sachsharbourcomic.com/ . The art is in the "getting better" stage, but the writing is pretty good in my opinion. Sach, (sounds like sack), the main character is a polar bear who tends to be grumpy and hungry much of the time. That's understandable since he's surrounded by, he might say plagued by, several other animals, most of which seem to be oblivious to the trouble they cause. The #2 character in the strip, and #1 cause of Sach's problems is a penguin named Pepper.
I find the strip somewhat similar to Mynarski Forest, but set much further north.