Hey, thanks for the feedback!
Randomness is what spices things up. No game is same to the previous one. Sometimes this may throw of your plan for the game, but adaptation is the key.
If you find yourself with this much metal, you will be able to outspam your opponent with cobalt frigates, who only use credits and metal.
Furthermore, since you play TEC, you can get some early trade ports with focus on crystal income. Yes, your export points in crystal will be limited, but that gives you another way you can adapt to the situation and try to expand beyond your own sector.
Finally, if you find those generations not to your liking, you can easily make your own random maps with solarforge, and ensure that players get crystal planets.
Or you could make a mini mod, and increase the spawn probability of crystal rich planets. This approach can still random you metal heavy spawns, since randomness can be like that, but will be more satisfying to your playstyle in the long run.
Hope this helps!