Don't lose all faith! I myself like romance stories quite a lot, but I absolutely despise "bad boys" and find the trope's popularity quite scary. In the end, it's all about what kind of fanbase and niche one writes for. And even if the bad boy/girl were the most popular character in your story, you can still write it the way you intended - the readers are reading it for your way of perceiving the world, not for it to have a cliche approach to storytelling.
@meimei If you don't truly believe that a good guy can finish first, it'll be hard for you to write it convincingly. I would recommend looking into healthy relationships and why the female chose the good guy instead of the bad boy. Usually, the good guy will still exhibit some masculine traits(protectiveness, providing, etc.) even if they're overshadowed by the bad boy's immense charisma. Don't fall in the trap of thinking that nice guys can't finish first - just figure out whether the nice guy that you're writing about is the kind of guy you'd fall for yourself. You don't have to write him all suave and charismatic - just give him actual personality traits that are attractive, since that way you can turn him into a serious contender for the MC girl's heart.
EDIT: From what I've seen in real life, sweetness/caring attitude can also be attractive in a man, but such people have sometimes trouble cutting off the sweet valves when it comes to other persons that their main love interest. This is a common and sensible dilemma for the "good guy" - how to be nice to other people without making the love interest feel like she isnt special. In real life, I'd say that the good guy would seriously need to cut down on the expressions of warmth he shows towards other women(aside from family members, of course) but retain the same kind of helpful mentality. Mind you, this is a trope that is showcased a lot in romance fiction, and I've VERY rarely seen the writer solve it in this way. Mostly in comics, wishy-washy attitudes are justified by authors all the way until the end. As you can imagine, it can get quite aggravating. On the other hand, it appeals to people who're less confident(and I get that), but a story about an unconfident man, and his rise from insecurity to responsibility, could be even more potent in the long run, especially considering its possible impact on people's lives.