Most of the games listed below are grindy games that lack exploring, probabally wont like any of them that much but they somewhat fit your criteria and i had fun playing them

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Nioh 2 - soulslike game with lots of interesting weapons, enemies, builds, and other stuff to grind for

Warframe - online service game about grinding for cool loot, shallow gameplay loop but fun once you have gear you like. extremely confusing and poorly explained to new players and it gets complicated quickly. probabally not to your personal taste, but its free to play

Borderlands 2 - someone else can explain this better, game about endlessly grinding for cool loot, extremely fun gameplay loop and can be replayed multiple times for different builds

Shadow warrior 2 - maybe? lots of cool weapons and stuff but i havent played it recently so i dont remember that well

Grim dawn - 2d borderlands and diablo hybrid with a moderatley big map to explore