Destiny 1 has more content that is better implemented, and with better quality.
Like quests, bounties, triumphs, subclasses, gamemodes, weapons, rewards, loot, Eververse, and etc.
I suggest you play the game itself, and really understand why its better.
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D1 would feel even better if all of those nerfs to balance PvP never happened. Shotguns can't even do precision damage anymore(excluding Chaperone and Universal Remote).