It's crazy how much nostalgia I see people having for the Disney era nowadays. My two favorite seasons are Disney seasons, and it's definitely a masterpiece compared to the Neo-Saban era, but every single Disney season was massively polarizing when it aired:
Ninja Storm was too goofy and departure from the more serious Space to Wild Force era
Dino Thunder got hate from the people that actually liked Ninja Storm because it was meant to 'fix' some of the issues that early Ninja Storm had
SPD was massively polarizing at the time: some people called it the best season since the late-Saban era; some people called it the worst season ever at that point
Mystic Force had a lot of good will in the first half, but a lot of people hated the second half
Operation Overdrive was universally considered the WOAT season
Jungle Fury was seen as "inoffensive" at best but nothing special
RPM was too grim dark and "didn't feel like Power Rangers"
The only Disney season people haven't warmed up to much is Operation Overdrive. It's still considered the weakest of the Disney era, but a lot more people say Once a Ranger is one of the best team ups (which nobody was saying at the time), and Will gets a lot more credit for carrying the season, when he was universally hated at the time.
Wonder if this is more kids growing up with the Disney seasons or people feeling like, "We didn't know how good we had it," since it was followed by the Neo-Saban era.