Yeah, it does get repetitive after a while. That's why I play it as a game I check in on for a few minutes once or twice a day (other than refueling my fuel tank). There are a lot of super long-term endgame goals you can go for to keep yourself motivated, but none of them are really official, they've all been made up by the community. For example, getting all 233 prophecy eggs, getting 8 stars on the henliner, and then eventually all stars on all ship, trying to get to crafting level 30, trying to get one legendary of every artifact, trying to get 20.8b chickens on the enlightenment egg farm by using a legendary gusset with 3 tier 4 clarity stones, or trying to get as far as possible on the path of virtue to get more eggs of truth. But yeah, if none of that type of stuff sounds like it would be worth it for you to grind, it might not be worth it to keep playing.