Finasteride shouldn't be causing those issues. There is post-finasteride syndrome which has been noted in a very small percentage of users.
Personally I use a topical dutasteride (1ml/1%) once per week. It's not an approved treatment, but preliminary studies show that topical dutasteride reduces systemic DHT by 50% as opposed to 70% reduction from daily oral finasteride.
I figure that getting post-finasteride syndrome is less likely with higher systemic DHT levels
I did notice lower libido after a year on finasteride, though it might have been all in my head. Thats why I made the switch. And I haven't had issues since