Are you playing any planet start?
Would you like to share your save?
Generally these 2 things are expected bottlenecks. They could be too harsh, so I will check on that
Fish breeding is vanilla recipe, and it won't be changed, because I try to avoid changing vanilla game.
But I can check if any recipe is using too much of them.
Titanium is intended to be bottleneck similar to LDS and blue chips in vanilla game
Numbers might be too low i will check that as well.
Fish and Titanium generally should not obstacle for scaling up, you only need coconuts palm and iron for that.