Harry Potter: epilogue era question (spoiler, so more info inside)?

Dumbledore died at the age of 115. McGonagall was the head mistress but retired in 2017 nothing is known after that because for some reason Rowling didn't want to put all of the information in the Epilogue even though she knew it but she said in an interview "you have to hold the urge to tell everything in a novel"..I mean honestly...You held that urge in all 7 books so why not let is be free for once in the Epilogue. Make your final book have a big finally. The Epilogue was my least favorite part in Harry Potter and the Deathly Hallows book. The book is my favorite in the series but the epilogue really sucked and I hate it.