You see that's what usually happens to long running franchises.In order for a franchise to survive for as long as FE does,changes are inevitable,there is no other way around it.
But not everyone is gonna like said changes and there is nothing wrong with that,after all everyone is entitled to their opinion.But there is a difference between being civilized when stating said opinion or being and acting like an gatekeeping elitist prick.
Awakening was my entry point to this franchise and my God the hostility and vitriol that I witnessed when people expressed their distain for the 3DS titles and the fans of said titles was disgusting.I've encountered my fair share of bad communities when it comes to gaming but nothing beats the FE community.