aftermarkets are mainly midrange speakers not fullrange. Even the coaxials are midrange and tweeter.
Full range means they play subsonic bass too down to 30hz. However they give up a little bit of loudness and overall sound to do so. They are made of cheap paper cones with very small light voice coils as well basically geared for boom rather than any sort of clarity.
Best aftermarkets can do is offer midbass which is 60hz and up but that requires acoustical door treatments, turning your door into a speaker enclosure, a lot of amplifier power, a bandpass crossover with adjustable slope and some time alignment. Aftermarkets are always meant to be paired with a subwoofer, there's no way around it unless your bass expectations and preferences are near zero.
Most people have ZERO clue how to sound good and they think swapping speakers will be a direct upgrade without needing to do anything else... lmaoo far from the truth. If you go aftermarket, you need to go balls deep for any real form of upgrade or else you'll be playing the speaker swap game and feeding other people misinformation from your own lack of knowledge on how to set things up right. Mainly by talking sh*T on otherwise good speakers but in your own install, you failed to do a proper install which gave you garbage results however you blame the equipment for it.