Some of the more popular mmorpgs have a bit more to them than lost ark does.
FFxiv for example has dozens of dungeons you can get in your daily roulette to add variety, dozens of trials you can get in your daily roulette to add variety, hard modes, raids, mount farms, 2 repeatable towers that are optional and can be run as many times as you want every day, glamour (transmog) farm, professions, housing (legitimate housing that can be customized), quests, gold saucer, etc. etc.
WoW is/was pretty much similar.
Lost Ark’s daily loop is 2 of the same exact guardian (no variety), 2 chaos dungeons (feels the same in T3 as it did in T1), and una dailies.
Field bosses, ghost ships, chaos gates, and adventure islands aren’t daily, legion raids aren’t daily, abyss dungeons aren’t daily, tower has zero variety and can only be completed once per character (per difficulty) , most islands can only be done 1 time, professions have a limit, etc. etc.
Lost Ark really needs a lot more daily variety like other mmorpgs to even come close.
They have scaling for the guardians already, they could have a random (optional) roulette like ffxiv to spice things up daily instead of just the weekly 3. They could add some interesting stuff to the islands to make them somewhat repeatable. Many other things can be done, but right now the gameplay loop for Lost Ark is very very shallow compared to the more popular mmorpgs of the last 10-15 years.
It does have really nice combat, good vfx, good sounds (mostly), decent customization when you have skins and dyes though.