I don't understand why you're obsessed with the idea that any user who still uses Windows 7 is have a higher risk of being hacked the if he use Windows 10?
Because this is the case. It is a fact, and not just my opinion.
I still use it and I was never hacked in 10 years of using it, and still have some coins in desktop wallets worth several hundred dollars that I don't care too much about.
Just because your PC didn't get infected yet (at least as far as you can tell), this doesn't mean that it is not by far less secure than a modern OS.
Who is lost crypto because of Windows 7? Is this OS responsible for any phishing, or maybe for all that fake Electrum wallets that take at least 1000 BTC from users so far?
The OS is not responsible for anything.
But it makes it way easier for an intruder to gain access to your system.
And you have to keep in mind that not every malicious person wants to steal crypto.
Gaining control over a system is enough for most blackhats. Abusing a system for further hacking attempts as a proxy, DDoS,etc.. Finding sensitive data is just the icing on the cake.
Who is exploiting this OS to hack users crypto, and how Windows 10 is better in anything then just more spying on users?
A lot of people and malware are exploiting the weak security measurements of Win7.
For example: Ransomware WannaCry. I am sure you heard of it. It only affected Win7 system. Win10 was not affected at all.
Any company affected was running an outdated OS. And they got their comeuppance. Damage which went up into the millions.
Additionally, Win7 networks are vulnerable to PassTheHash.
Win7 has no Hardware based security at all, no Trusted boot, no Virtualization based security (secured environment for critical windows processes) and much more..
If you care about your privacy, you shouldn't use windows at all.
This is not an argument pro win7 / contra win10. This is an argument which is contra windows in general.