So u r saying ground/rock typing won't make a pokemon broken. It's the abilities, movepool on the top of good stats that make a mon broken.There are many things that can make a pokemon broken. Generally it's a combination of things.
If G-Darmanitan was Ground/Rock, it'd have also been banned (in fact, even faster, since it'd resist stealth rock), because what made it broken was the insane combo of Gorilla Tactic, another Choice item, and high stats with high BP attacks.
If Blaziken was Ground/Rock it'd also have been banned (in gen 6-7), because what made it broken wasn't the typing (fire/fight isnt even that amazing since it gets walled by things like Toxapex or the slow twins), it was the fact it had decent stats, Sword Dance, and Speed Boost, and the game didn't have anything.
Flying/figthing is equally insanely good offensive typing. Even a legendary mon has it but it doesn't even close to run over teams. lolGround Rock is a actually insanely good offensive typing, a glass cannon Ground Rock would very easily run over teams unless it has some glaring flaws. They'd get quickly in the scenario where you're forced to have Aqua Jet users everywhere or run Swift Swimmers.
If your team is being run over by rock/ground lycanroc then the problem lies in your team not that the pokemon is broken.
It's weak to most priorities. Mach punch, bullet punch, grassy glide, aqua jet and newly released wave crash. Pheromosa and Deoxys are legendaries and are designed to be broken. Why r u making such stupid comparisons?It doesn't matter if defensively it's trash when once it gets in it can claim a kill every turn. Plenty of other glass cannons like Pheromosa or Deoxys proved it already.
My "beloved weavile" lolEven your beloved Weavile is a clear example of how it doesn't matter if you have one of the worst defensive typing in the game if your stab are strong (and the only thing keeping Weavile from ban is the fact its stabs are either low BPs, unreliable or punishable super hard by rocky helmet).
Weavile is nowhere close to being banned. Before it got triple axel, it was BL.
Zeroroa commonly runs CC. Tapu koko could still criple it with toxic. Regieleki runs explosion. And Air Ballon variants of Magnezone kills it with BodyPress.Rock/Ground even gets free switchin on electric types which are super common because Volt Switch is a thing.
Also, a matchup of rock/ground glass canon(i changed the typing of lycanroc to rock/ground) against some common OU mons
-1 252 Atk Life Orb Lycanroc Stone Edge vs. 0 HP / 4 Def Landorus-Therian: 142-168 (44.5 - 52.6%) -- guaranteed 3HKO after Leftovers recovery
252 Atk Life Orb Lycanroc Earthquake vs. 252 HP / 252+ Def Ferrothorn: 117-138 (33.2 - 39.2%) -- 10.8% chance to 3HKO after Leftovers recovery
252 Atk Life Orb Lycanroc Stone Edge vs. 152 HP / 0 Def Buzzwole: 148-175 (37.6 - 44.5%) -- guaranteed 3HKO
252 Atk Life Orb Lycanroc Stone Edge vs. 252 HP / 168+ Def Corviknight: 146-173 (36.5 - 43.2%) -- 98.1% chance to 3HKO after Leftovers recovery
Far from broken lol.