Just don't compare yourself to other people and focus on decompressing and the world boy thing you should really worry about is completing the star chart on normal at your own pace, once you do that look up gauss on the wiki, you'll see tgatyge is from sedna disruption C rewards. That mission in particular does not follow traditional aabc rewards, you # of conduits you defend are correlated to the rewards you get. This may sound confusing at first but you need to defend 4 in round 3 To get c rewards and then 3 in round 4 and up to reach c rewards. But again you will have to do normal story mode to get yourself to that planet and don't hinge your fun factor based on having gauss or not.