To be honest I will never get RE 4 being called a terrible RE game.
It kept the horror elements. Ammo is still relatively low, the atmosphere is oozing everywhere, you can almost feel the stench of death and decay emanating from the game. Enemies could take a beating prior to fully upgrading your weapons. Creature design was disgusting and disturbing. The environments were varied, well designed and could still be claustrophobic. Even in New Game+ runs a careless mistake could screw you over and get you killed. Add in the bonus modes for extra replayability. New and refreshing gameplay redefining the series and genre. RE 4 was not a problem it was a good intention, RE 5 and sebsequent sequels were the ones that took it the wrong way.