It's short and it's fat. There's not much else to say. If you find short and fat to be appealing, there you go. It is a waste of energy to hate on a cartridge but I find it easy to hate on the WSM's. It might just be prejudice talking. GD
That is my feeling also, yet I own a couple 350 Rem Mag's. The only reason for me to own such a thing is that I wanted a carbine with power.
Of all the short fat cartridges the 300 WSM is the likely one of the most successful, if not the most. I prefer the 300H&H.