Shooter saw Spider-Man as one of the company's flagship characters and it really showed through all of Secret Wars. I mean, other scenes include him one-shotting Piledriver of the Wrecking Crew and whaling the living daylights out of Titania and then tossing her away while she can't lay a hand on him.
Really, the way his speed and spider-sense were presented back in the day, this is the way things should often go if he's not distracted; he's just not going to get hit unless his foe is *really* good and fast, or has some gimmick he's not expecting. It's just that more recently many writers have conveniently forgotten the speed, the spider-sense, or both, whenever it's more convenient to the story for him to lose because... well, just because. So now he at least periodically looks like a wimp, fails to dodge objects *thrown* by Bullseye when he can easily dodge bullets, and so on