Shattered moon game bug broken unplayable

Shattered moon superstructure fabrications, frustratingly annoying I can't stress enough and very angry. Attacked a droid to get collectable which glitches and didn't count, I still have showing 14/15. To make things worse after fighting boss and collected Crossguard lightsaber the saber glitches, parts were invisible. The collectable I was missing I tried to backtrack to get it again and does not respawn so I've completely lost it. Then up on the higher level to get back to the mantis I can't get back through the door where I had the boss fight and I can't backtrack in the other direction. So now the game has completely broken, lost all my hours playing the game and now I have to restart the whole game again, or is really worth it and it's just another trash game to add to cyberpunk and starfield. What are you game developers doing?????. I'm really p****d off right now