Age gap criticism online is always fueled by jealousy and wish fulfillment
If the man is a rich white man with old money, it's "you go girl"
If the man isn't and they don't find him attractive, it's "you're a predator
They're also just jealous that they have to compete with younger women.
Very few are actually genuine.
Same as any other criticism. Don't listen to those losers, don't let them think you are a bad person, don't let them influence your decisions in life. Do what you want