It tells us everything. He's with us after gaining promotion, living with his partner locally having just had their first baby, yet he decides to uproot all of them to go to Rotherham Utd. Its not exactly an opportunity he couldn't refuse, albeit I have no idea regarding the money involved. He clearly wanted a new challenge.Sorry, but that wasn't 'clear' at all. I don't know how you claim to know what he 'felt'. Yes, he obviously showed some frustration at not having more resources to sign his preferred players. But what he 'felt' as a result of that understandable frustration is just your supposition.
All that we can deduce is that he's received an offer that he's decided to take. It tells us nothing about how far he 'felt' he could take the club.