Smithing is actually fine, just dont overdo it.
60-70 in Smithing is a healthy number. So you can increase magic weapons.
But dont get ebony and above. It ruins it.
Highest to smith I say is gladd and or Dwemer/Orcish.
Enchanting is a lot worse then enchanting can ever be.
No physical damage character should touch enchanting, and vendor most of the gear you get that includes enchanted damage, only keep unique items, like Kronis face helmet etc.
Smithing at around 60-70 only adds around 20% damage, if you know the metal you can increase it a tad further.
Thats ok, but dont get 100 and dont learn to do legendary ebony and daedcir items.
And never, ever combine it with enchanting and alchemy.
I had the same issue as the OP.
Im now playing a thief. Stealther with a bow, and sword and shield for melee. I do have smithing to a mediocre level, but no enchanting or alchemy.
My highest skill is pickpocketing.
Im lvl 34, and I am forced to play on adept vs most encounters, but I do try Expert alot. On Adept I am kicked in the nuts alot, on Expert I need to play hard vs mediocre enemies. Bandit leaders etc is impossible unless I play Adept.
Im having an insane blast and loving the fights im in. Its very tough.
Also I do not use Lydia.
My gear consists ONLY of pickup gear. Thief guilds leather armor and a glass bow I just found.
I was using a dwemer bow from lvl 25-33. I was using an unimproved imperial wood bow up until lvl 25. I had to use every bit of tactic I can find.
The game is crazy challenging at times, but only if you build your character for it.
Taking enchanting, using luckily found enchanted gear in overflow, or self made through alchemy potions. Do this and tha game IS easy.
Cause the game is balanced around people that does NOT use secondary professions, not for those using it.
Game developers needs to make a challenging game for everyone, but they need to make it for those that just want to explore and fight especially, those that dont touch secondary professions.
People that use 2ndaries have the expert and Master to help, but the synergy is over that top, and if you overdo it, there is nothing in this game that will be hard.
Me: Im still using iron arrows at lvl 34.........with my glass bow.