While there is nothing wrong with liking and being attracted to women younger than you, as long as they are legal, I do think that how most older guys go about it is pathetic. Now before the whole board jumps on me, let me explain.
If you happen to be a 35 year old guy and say some 19 year old girl is really into you, there is nothing wrong with being attracted to her and taking her home. In fact, in NYC it is somewhat common to see men in their 30s date and marry women in their early twenties. However, in these cases the guy is often attractive, cool, and the girl is usually the one chasing him because of his status and his success in life. The guy is also in sync with the girl's way of life and her crowd so he is easily accepted into her crowds.
What is pathetic is how most guys who are older and "red pilled", often out of sync with younger culture and what is cool in that word, pedestalizing younger women and chasing them. These guys are cringe because they will post crap on the internet such as "I want my fertile young women" (serious, say that crap in real life and look at how fast everyone thinks you belong in an asylum).
Being an older guy (30+) and trying to target going after younger women because you failed with them in college or your early twenties is quite pathetic. In fact, most of the times, you are going to fail if you are any of these red pill or pickup guys because you can't relate to their way of life, what they find cool, what they like, and are usually going to come off as that creep at the bar that they want to get away from.
Finally, as much as older dudes talk about "the wall" or how damaged older women are, most of them aren't a catch themselves either. Older guys are often bitter, out of touch, and weird themselves so I never get them attacking older women that are still single. You aren't really that much above dating an older woman or a woman around your age because you have just as many issues as she does in most cases. You two are made for each other.