That is completely, completed untrue. I really don't know what you expect to gain from such massive gaslighting when there are plenty of people who were online then and remember what happened, and that it was the exact opposite to what you're claiming.
MN was basically ground zero for Meghan Hate from the moment they got engaged. In the run up to the wedding and right after the wedding, and also during her first pregnancy, there were a dozen new threads being started every single week just dedicated to trashing and scrutinising every single thing about her. Entire threads about her having scented candles at the wedding, or the lie about her not having any friend at her wedding. Constant racist dog whistles and barely disguised racist comments. Anyone defending her being bullied and stalked around the site, even doxxed. Constant referenced to really horrific Tumblr conspiracy theories about Meghan being a former prostitute (which someone claimed on this thread!), porn tapes, secret third marriages, Doria being in prison. Brand new usernames popping up regularly claiming to have a friend working in Buckingham Palace or Hollywood who had first hand info that Meghan was an abusive bitch everyone hated.
It was just full on hate for years, and posts were only deleted if they contained really overt racial slurs like the N word. Even the post from someone claiming their friend worked in BP and watched Meghan punch Charlotte wasn't deleted. It's true that a lot of threads got deleted but only because they descended into bunfights. For a long time they refused to delete even really obviously libellous or abusive posts about Meghan.
They only started to crack down on Meghan hate threads because of the scandal with the rival forum and the subsequent trolling of PBPs.
Yet at the same time any thread not positive about Kate, even threads criticising her clothes, would be deleted instantly. I remember a thread saying something like AIBU to think Kate made an unwise choice to wear so much expensive jewellery to meet NHS nurses and it was deleted almost immediately.