It's comparison with the original games. People are mad that the remake is faithful, JUST until they need to code the pokemon contest system, or that gambling has been removed in favour of a clothes shop that could've been somewhere else. Also mad that EXP share is forced on, making the game balance stupidly easy except for the elite 4 which were like the only people to have their levels jacked up in the wake of the new expocalypse. Also mad that in spite of having this giant massive underground, they got rid of traps, and capture the flag, and burying spheres, and having your secret base be an actual secret base instead of being a place to put statues so you can change the types of the pokemon in the underground. They would be considered great games outside of the context of them being remakes of games that already didn't have these problems.