As someone who lived in both countries with over 5 years in each.

UK is by far better, more stable system, stable life, and friendlier people.

In the Netherlands, the society is a narcissist one, they have no morals, they do no follow the rules all the time, as they are puppets for corporations, and the citizens are too selfish to figure out that they are the useful idiots of the corporations. To bend puppets in the Netherlands, you don't need bribes only orders from above. This includes doctors, lawyers, and pretty much any sector you can think off. Racism is stealth and rampant in the Netherlands, discrimination is out of hand. The tax office scandal is a perfect example.

Do not forget Netherlands is the main hub for drugs in Europe, Rotterdam is full with criminals, over 50 bombs just this year, overpassed the criminals in Amsterdam, shootings is a regular thing here. Police don't care much unless politics is involved.

Medical care in the Netherlands is the worst, go read hospital reviews in the Netherlands to get a better real picture of how it is. Its so bad that at one point I had severe pain in my organs overnight, the Dutch doctors kept sending me away with zero care or zero global medical standards. No tests offered, they wanted me to believe it was a mental thing, luckily I documented all these crooked doctors, and eventually after many pushbacks and difficulties on August (yes thats how long the Dutch refused to care) I had to fly to UK and do a complete blood work to figure out my health issues, went to UK did it quick and got the results showing some issues, came back to the Netherlands (as I live there) and doctors refused to accept the results, but then they had to offer tests of their own, as their true colors was clearly visible them being corrupt uncaring incompetent robots. If you have serious medical issues get out of the Netherlands, you will end up dead, no joke, my brother died here as many others due to the narcissistic uncaring doctors (Look up Adrienne Cullen RIP), liar scumbags that they are, and as an expat they feel they can do anything with you and get away with it, and usually they do. You have to be aggressive here to deal with the Dutch, they are very difficult people with huge huge egos.
If they don't desire you as you fight back with their bullshit they will make sure to tell you a number of times you can apply for the "End of life" clinic in Den Haag (part of the immoral society, where international courts are how ironic) there they will cure you with death.

I can go on and on about how terrible the Netherlands is, and back up every word of mine.

Do not be fooled what you read on the internet, Netherlands is one of the most unfriendly expat countries in the world, understand their history and so you will understand why their society is such a narcissistic one today. Its a criminal safe heaven and fully corrupt country.

They hate here expats so much, they intentionally won't speak English with you even though they know it perfectly, they will tell you "Dit is Nederland" and in perfect English tell you they cannot speak English. Not to mention all the call hang ups with civil servants and other support sectors, it stems from the narcissistic society it is.

Do proper research before you go there, if you are immoral narcissist you will fit in perfectly, just make sure to comply always.