You’re not going to find this magical tyre.
Wet roots are the nemesis of every tyre, it doesn’t matter what tread pattern, compound or PSi they’re inflated to, a wet root hit at anything other than dead straight has the potential to spit you off your bike.
Work on your technique.
If you can’t hit the root straight on then approach it traveling up the root so to speak, hitting roots off camber and traveling down the direction of said root is terrifying…. try lifting the front over with a wheelie or manual.
I was a bit obtuse with my initial reply, obviously soft compound tyres do help but they’re not the magic bullet, even pro DH-ers have problems with wet roots and they have the finest tyres available to them.
Watch ‘corner carnage’ on YouTube, you may need to put Gravity Enduro in the search bar also, maybe Innerleithen too…either way it’s footage from the inaugural year of Steve Parr’s UKGE and the video is at a corner with a horrible wet root in the way, much hilarity ensues as virtually everybody has problems with it and there are bikes and tyres of all kinds being ridden over that section… its not the tyre in wet roots, its technique (and luck).