I liked the show as a kid, but only because I had no familiarity with the comics' Spider-Man. If I had, I'd have seen how totally inadequate the show was. It removed the Uncle Ben backstory, the single most crucial element of Peter Parker's journey. It dropped Aunt May (and Robbie) after the pilot, and otherwise used none of Spidey's supporting cast except Jameson, who was turned into a much softer, more avuncular figure. And it mishandled the spider-sense, changing it from a heightened sensitivity to immediate threats to Peter/Spidey himself into a generalized psychic awareness of plot-specific crises happening somewhere in the general vicinity. Basically the only thing it didn't get wrong was the costume, which was certainly an imperfect translation, but pretty good for '70s TV.
Still, in my childish naivete, I found it moderately entertaining. I liked Nicholas Hammond in the lead, and I really liked Dana Kaproff's funky musical score in the second season.
The show lacked Spidey's colourful rogues' gallery. Was this budgetary or so as to avoid comparison with the 1960s Batman, I wonder? Or a bit of both.
Really, if you look at the history of live-action superhero adaptations prior to the '80s, the Batman show was the exception to the rule in using established comics villains -- and even it used only nine villains from the comics (Riddler, Penguin, Joker, Catwoman, Mad Hatter, Clock King, the one-shot villains False-Face and Eivol Ekdal, and the semi-original character Mr. Freeze, based on a one-shot villain named Mr. Zero) versus over twenty original villains. Most adaptations of comics used only the heroes and created their own villains. (The first
Captain America serial didn't even use Steve Rogers or his powers!) The only minor exceptions other than
Batman were the second Kirk Alyn Superman serial, which used Lex Luthor, and the '70s
Wonder Woman series, which used '40s-era comics antagonists in its first two regular episodes (Baroness Von Gunther and Fausta Grables) but no comics foes thereafter. So
The Amazing Spider-Man was par for the course in using only original villains.