Leviathan mirror battle

My guild have found multiple counters to Leviathan . I personally have a 7* Leviathan at event required pilots and beat higher relic'd teams even if I go 2nd. I see guildmates win using Profundity 90% of the time, Chimera with Scythe, Negotiator with Maurader and Executor. My offense battles still let me beat everything so I get 1st in Arena so I don't see an issue. If you are just complaining because you haven't learned the mechanics or because no matter you use it's not a guarenteed win well that is life you need to put in an effort to perfect your strategies and even then Random stuff can always happen with this game.