What part of the concept was flawed from the start?
I don't know if I agree, but I can definitely see a valid criticism coming from this. The ownership of Spider-man as an IP is a convoluted mess of legal entanglements, Hollywood political drama and movie reboots. I definitely see Tom Holland's Spider-Man as the more tolerable version (so far) but there is so much IP baggage attached to it, that it story wise, makes the decision to use Spider-Man questionable.
However, expectations aside, lack of a certain character or feature doesn't seem like a fair criticism of the ride that exists today. They can always add new scenes, new characters and new villains later on.
Not ... really. If most of the reviews turn out negative but the ride still garners 60+ minute waits, and draws people to the park, then it could be objectively a success, even if you subjectively hate the ride.
I guess I'm old enough to remember the massive amount of online complaints levied at Midway Mania not using real sets and just basically being a warehouse of screens, but that ride is still hanging on 13 years later.... and I still never go on it because the line is too long.
I'm definitely not buying any Spider-Man toys, but seriously more power to the people who like them.