Look I think Meghan has some awful traits and is manipulative and egotistical but sorry, IMO there's some snobbiness here generally, not just specific to Meghan, as well as some untruths/half-truths.
it’s been suggested that she herself isn’t THAT kind of actor - classically and rigorously trained for the theatre, and therefore felt insecure in that world. TV acting is very different.
It doesn't need to be 'suggested' she's not THAT kind of actor - it's a black and white situation surely, either one has a classical and rigorous theatre raining or one doesn't?!
She did study theatre at university (as has been mentioned on this thread
) but no, she won't have had the same classical training as someone who went to RADA.
Yes TV acting is very different, but that hasn't stopped TV actors with not one jot of classical training from starring in Broadway plays. There isn't the snobbiness there about acting that there used to be here.
She didn't "snub" the NT patronage, she stepped down because they'd left the UK. She visited the NT many times and was in contact with them; I know this from a friend who worked there.
In the US she went to see Broadway shows several times. But no, she's probably not massively into the theatre and that's not a character flaw. Some people aren't as traditionally cultured as others, it doesn't make them lesser than.
Meghan's 'things' have always been food and wine and travel.