I enjoyed The Last of Us & finished it a couple of times on ps3. I didn't enjoy the remaster as much because A/I knew the game too well & B/some 'quirks' in terms of visuals were evident (at one point after escaping from the Quarantine Zone near the beginning of the game at night, the blacks were really washed out & ugly). Also, after a couple of playthroughs the forced walking sections were a real bore.
I also never played the DLC because the entire premise was based upon caring about Ellie & her origin story - which I didn't. I enjoyed the stealth encounters versus clickers & humans in the main game, likewise the occasional humor, such as the hilarious magazine scene in the car (sticky page!). But I wasn't engaged in the characters much, at all. The ending was also bittersweet, but I suppose some people might enjoy that sort of thing.
On a personal note I'd say the only parts of The Last of Us which are 'overrated' would be the characters & story (roadtrip daddy issues) & the begging, i.e. a forced run in one direction with very little player input which was supposedly 'awesome' because some people believe a video game should be judged based upon how it compares to a movie. F that. I'd rather play the Pittsburgh chapter > the intro sequence a thousand times.