And you just listed why alot of people don't like the movie. People want to see Spider-Man kick ass, not see a very shitty done romance plot. This also does not excuse the poor writing either.
The two underlined things are entirely subjective. And I know a lot of people look down on love stories as a main plot or just don't like them. You are certainly entitled to your opinion and preferences, which are as valid as mine. But they don't in any way support the idea that the movie was bad (which is just an opinion) or that the producers are doing it wrong. I've always found the latter attitude kind of strange, how people who had no hand in creating a story seem to be so absolutely sure of what it is supposed to be, and get mad when it doesn't fit a certain expectation.
I can tell you, just to offer and opposing viewpoint, that old Spider-Man kicking ass got old fast for me, because I found him boring as a block and I couldn't care less about who he fought, whether he won or lost, whether he saved the girl or not. It all felt extremely pointless, because the old movies stroke me as all show and no meat. And when it tried to get into the latter, well, it was terrible at it. So I'd take a love story that I actually find engaging over that any day, thanks.
I don't expect anyone to change their mind. Just accept other people liked the movie, for their own reasons, and not because they had terrible taste since the movie was certainly, absolutely, and objectively junk, but because their different people with their own minds and opinions, right? Variety is the spice of life and all that jazz.