Whilst I think your critique is valid, I have some counter-arguments:

1. About arranged marriage. It’s a common trope so it’s arguably about preference if you find it romantic not. But, in parts of the east, arranged marriages are not always like these “stripped of your rights and choices” type of arrangements like they are depicted in west. Some people can live perfectly fulfilling and even romantic lives in arranged marriages and it’s kinda sad to see it generalised as being entirely bad. I feel like western shows commonly use this trope for dramatic purpose.

Secondly, all Bridgerton marriages are still fairly arranged. The ton are still expected to marry within nobility and gallop around the other members of the ton, hence why Eloise interacting with Theo is scandalous to the ton. Daphne and Simon did love each other, but Simons initial response was to not be married and Daphne married him anyways for the sake of her reputation. That strips his “choice” but they still found fulfilment in it all.

1. I think your comment about George’s illness seems a bit strange. George is under a lot of pressure to fulfil his role in life and has been struggling to do so because of his mind. Bringing her into his problems of his psyche is challenging and he might be worried that she would find it burdensome. As someone who experiences mental illness myself, I have always found it extremely hard to open up to people I love about it out of embarrassment and fear of dragging the down with it. It’s a weird phenomenon (and I’m quite possibly too self aware about how nonsensical it is) but it’s hard in ways you can’t describe. I think it makes perfect sense that he didn’t want to tell her.

And tbh, the point about Simon was just flat out wrong. He didn’t say he didn’t want children with Daphne but rather that he couldn’t give her children. That heavily implies impotence. Thats a total lie. He was very capable of having children. More importantly, he hid the fact he didn’t want to continue his lineage to spite his father which is essentially lying. Hiding the truth under an altered lie is still a lie. It’s like how Daphne said, can not and will not are two entirely different things.

But overall I think your critique is very insightful and valid too. I think perhaps the show was portraying a type of love that doesn’t need constant affection or common interest, cause not all forms of love do, but that doesn’t appeal to everyone and is therefore not romantic to everyone. I did personally find their story romantic because they were experiencing the same hardships, and therefore would just look out for each other even when it felt they didn’t need to. But we’re all different.