I see what you are saying, Ilyala, but I don't think one can compare in any way Bertie's upbringing with that of his own children. I don't think Bertie was ignored by his parents at all - quite the reverse in fact - but his early years were marred by a lack of affection from his parents, which he craved. The demanding programme they carefully devised for him backfired badly as it suited neither his intellect nor personality and I'm sure it shaped his future life in his seeming determination to enjoy himself at the cost of others (wife and children) and his general over-indulgent tendencies.
He did participate in choosing how Eddy and George were educated and received regular reports on their schoolwork and conduct but, apart from that, he was hardly a guiding light for them or the girls, as far as I can see and actually turned his back on them when problems arose.
I don't think his position and the time can totally excuse him either - there were devoted fathers then too - what about Fritz, for example?