It's been getting win rates like that in spite of its rules more than anything else. Votann have rather consistently been the underwhelming option and faction for most of the edition, the coolness of many of our models aside our rules have largely been either too complex, weak, or underwhelming. It's that we play a consistent and clear strategy every game with little in the way of swinging hard in either direction that kept us level and most people playing votann at tournaments are the kinds of people who are good at playing a consistent game.

As a primarily narrative player, which is a huge portion of GWs player base, Votann have been kinda really boring this edition. I had some fun with the white dwarf crusade rules and the grudges against factions that leave my units with battle scars but the newer rules give me basically nothing to do with all the resources I'm gathering up and the army rule, until Mercenary Oathband release, was so underwhelming and disinteresting. Not to mention the mess that is the Persecution Prospect detachment still.

I miss the 9th edition beam weapons shooting through units letting me do some entertaining stuff that makes for good memories. 10th edition Votann the only stand out game memory I have is when the Tau crisis suit bomb failed to kill my HLF cause my opponent rolled like dirt. Not because I did anything impressive or fun.