It seems we played different games RE saga was at a standstill and needed an stimulus. RE4 brought it, with a new control scheme, enhanced graphics and animations. Even though all the changes the game held the essence of previous iterations. I've played them all since the first one on a playstation and RE4 still gave me the same feeling despite the big differences on playability. Of course Capcom perverted it and jumped into the mainstream wagon after that. Story wise, the game is as ludicrous as every other iteration, but i enjoyed it pretty much, maybe cos i'm spanish and lol'd about it And maybe i'm a poor gamer but i found myself dealing with low ammo lots of times, especially on professional difficulty. Still... opinions...
Honestly, it does feel like we played different games. I guess that if you truly played all the other games in the series and still got the same feeling from it, and still had ammo problems, then I can't really argue with your personal experience playing the game.
But you still can't describe it as a game in which you have to "spend your resources wisely." It's just a matter of aiming and shooting well enough to not run out of ammo. Unlike previous games in the series, there are no choices as to how to approach a given situation. There's no deciding if you should shoot this enemy and use up ammo, or run past it and risk getting hit. There's no deciding if you should pick up this item and use a precious inventory spot or leave it where it is, but not have that extra health when you really need it. There's no deciding if you should take this route because there are some herbs you need, but also some enemies that might damage you, or that route which is safer but doesn't have any reward for successfully taking it.
In RE4, there is always only one path forward and only one correct strategy: kill every enemy in the room and pick up every item you find (unless you're out of inventory space because ammo and health items are so abundant). Pretty much every new game in the series since has followed a similar formula.
Have you actually played Resident Evil 6? The story in 6 is way, way stupider and moe off the rails than part 4. It's probably the worst story of any story-intensive game I have ever played, which I say without a hint of hyperbole.
Nor does 4 have nothing to do with the previous games (now that's hyperbole). It doesn't revolve around Umbrella (good!) but does star Leon. Branching the story off in a new direction is a far cry from not relating to the existing story.
Agreed with others saying that RE4 has poor controls. Back when it actually came out on Gamecube and Playstation 2 though, those controls were still somewhat acceptable.
Yes, I have actually played RE6. I'll admit that there were some totally ridiculous parts to it, but I actually really liked a lot of the story. Either way, it's still better than RE4, whose premise was that Leon now works for the president and is being sent alone to a village in Spain to rescue his kidnapped daughter. Are you a bad enough dude to rescue her? But wait, there's also coincidentally some sort of biohazard outbreak here too, even though your current mission has nothing to do with the Raccoon City incident. But don't worry, because there is a magical, immortal merchant that sells you shit and gives you prizes for shooting blue medallions, who goes wherever you're going but somehow always manages to get there first. And that'll certainly come in handy when you're being chased through a castle by a giant animatronic midget statue. Also, that magical teleporting merchant took the liberty of setting up shooting range games with cardboard cutouts of various RE4 characters and enemies, and he'll give Leon some neat-o bottlecaps to collect if he does well at them!
Also, saying that the story has nothing to do with the rest of the series is barely hyperbole. Change the names of two characters and get rid of a few throwaway lines of dialogue, and you have yourself a brand new IP that is in no way recognizable as Resident Evil. The few-hour-long Separate Ways mode, which was not in the original release of the game, had more to do with the rest of series and had a better storyline than the entirety of the main game. Not revolving around Umbrella and branching off in a new direction was not a good thing when the current story arc that had been built up throughout the entire series had not been completed yet. For years, the series had been building toward one obvious conclusion (the main characters all teaming up to take out Umbrella) and then RE4 just handwaves it all in the opening CG intro by casually stating that Umbrella is gone, six years have passed, and Leon has to save the president's daughter.