Men have ruined online dating for other men. Guys who know how to create a good profile, photos, and messages, those are the men hurt by the creeps, losers, and thugs on here.
That assumes online dating worked for such men in the first place. As far I can tell it never did. If you think there aren't enough 'creeps' in 28 year age span around a woman's age to flood her inbox, think again. If what these 'creeps' do didn't work they wouldn't do it. Thus it must work. It's low effort and they can send out hundreds and thousands of messages. Even less than 1% success rate is good payback for nearly zero effort. The 'creeps' have hit upon a sweet spot for online dating and age limits aren't going to fix it.
This is something those of us like you and I have to recognize as a given. It exists because it works for them and it's not going away. Not with some mere age limit anyway.
Oh and to your earlier post, yes, some real women in the online dating world are looking for / considering men > 14 years older than they are. Some even send the initial message believe it or not. I've experienced that first hand so I know it happens.