I love how you made him as the famous English worm, one of my favorite dragon types. The worm kinda is a dragon you don't see that mutch anymore and it's oftenly confused with the wyrm and the lambton worm, so seeing this beautiful worm you made here really warms my heart, the dragon type isn't forgotten just yet.
I love when people are so insistent in being wrong lol I can only assume the 1977 cartoon version was the first time you ever saw a depiction of him? And I couldn't find your own attempt of creating Smaug. Instead of complaining about artists' work, just seek out ones more to your liking.
There he lay, a vast red-golden dragon, fast asleep; thrumming came from his jaws and nostrils, and wisps of smoke, but his fires were low in slumber. Beneath him, under all his limbs and his huge coiled tail, and about him on all sides stretching away across the unseen floors, lay countless piles of precious things, gold wrought and unwrought, gems and jewels, and silver red-stained in the ruddy light. Smaug lay, with wings folded like an immeasurable bat, turned partly on one side, so that the hobbit could see his underparts and his long pale belly crusted with gems and fragments of gold from his long lying on his costly bed.