The first step is to replay the missions where you didn’t get a three-star rating. All episodes excluding the side story can be replayed for 5,000 Gold if one chooses to.Contains a new Exotic if any remain to be collected otherwise, it contains a random piece of Exotic armor.
However, by the end of it all, you will have enough XP, loot, and weapons to make it worth your while. Even Destiny 1 let you replay the campaign. Again, players can also play solo and offline. Amanda gave me the finger, just like you.
They need to rebalance this, my suggestion is have it be single point of capture. Destiny 2 can you replay story missions with friends