No doubt General Tilney is a gruff, impatient man but did he treat his servents quite so badly as you say ?
At Northanger Abbey, Gen. Tilney's new domestic offices not only benefit his vanity, but soften the labours of domestic inferiors. (23)
'They took a slight survey of it all; and Catherine was impressed, beyond her expectation...The purposes for which a few shapeless pantries and a comfortless scullery were deemed sufficient at Fullerton, were here carried on in appropriate divisions, commodious and roomy.'
English kitchens in the early C19th for servants were notoriously smoky, dark and often fire danger, etc. (gothic!)
General Tilney renovates the ancient kitchens with every modern invention 'to facilitate the labour of the cooks'. Sure, the fancy innovtions facilitate his hot dinners to the table, but I'm sure his cooks are also glad of the convience !
While I could not call General Tilney any philanthropist, my impression is he's utilitarian in his approach to servants' work conditions.
JA did not intend General TIlney to be a gothic monster who cruelly mistreats his servents. I think that is why Catherine is surprised by the order and comforts of the domestic arrangements for the servents.
The servant girls who stop to curtsy appear orderly and neatly attired with pattens. Do the General's servants live in such fear and trepidation of the master ? Okay- General Tilney lost his temper with poor William whilst trying to impress an 'heiress', Miss Morland. Yet, I notice one of the footmen dares to sneak off, out of uniform (dishabille)
In my other post, for heaven's sake, I made the point I did Not compare Darcy with General Tilney.
I am also unsure how you equate any remark in my other post with the General's children-- on that question, General Tilney's greed and control toward his family circle are his worst qualities .