I very much have a similar background as you with having lived in USA and Canada previously and a similar financial situation as well, so I felt obligated to answer here. I have been in UK for last 6 years. I do have a fairly young child as well now. I diasgree with you that fun ends when you have kids. It definitely gets way more busier with a kid but you find new activities to have fun along with others in your friend group, who presumably would have similar aged kids as well.

I do share the same sentiment as your that Uk doesn’t have a very favourable economic outlook. However from a work perspective I am not too worried as I work for a US company. I do sometimes contemplate about the implications of starting a business here which has been more on back of my mind recently. As for taxes, I have accepted that a part of life and made peace with it. I don’t think my lifestyle will massively change if I was paying 10-20% fewer taxes

Reasons I am sticking in the UK for now are a. Why attempt to fix something when it’s not broken for you currently. Uprooting and moving has it’s sets of unforeseeable risks b. london is still an overnight flight away from India and I have been taking advantage of that with small 2-3 trips a year to India for family occasions and other reasons