Dave –
Of course you don't know what "all the anti 10s are complaining about" if you don't ask them, or read their reasons.
You may have had no problems but as you say, yours was a new installation only about 4 years ago on a new computer; probably long enough after WIN-10 was first published for Microsoft to have corrected initial faults.
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Many of those, including me, whom you dismiss so cavalierly had probably done as I did – fallen for Microsoft's threats and promises when it first published WIN-10 as a free offer, and loaded it on an existing computer with an earlier Windows version. My PC was only about a year old at the time, using WIN 7 Pro (it still does), and the WIN-10 I installed was most likely the first edition.
I did not like its screen appearance and the pointless changes, but that's probably more taste than technicalities. I did notice it had a better photograph filing system, but did not explore it far enough to know if it would support my 'Word', 'Excel' and third-party files and programmes going back years. It didn't appear to come with any useful programmes, such as 'Word' and 'Excel', or if it did they were heavily stripped-down versions.
It was also hard to find anything "normal" in it, in the Microsoft Windows series sense. It appeared designed primarily for the "smart"-'phone & Facebook fans, not for the serious applications which the series had always previously supported.
What I did find and I was pretty angry about it, was as I said . It deleted my several web-site registrations. When I reverted the computer to WIN-7, an option MS offered, restoring them was a long and difficult task that should never have been necessary.
I was careful to use the 'Custom' installing to omit fringe "features" like Cortana (which I believe Microsoft has now scrapped), to reduce overheads, and as the rubric explained, to limit MS' access to my computer.
Microsoft frequently nags me to replace Internet Explorer with Edge, but I am resisting for the reason above: I cannot trust it. I have a secondary Outlook account that MS also says is "out of date" but I rarely use it now – the trouble is, I can't close it!
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I use Bulldog too. It keeps trying to persuade me to buy its e-post encrypting software, but although most of the surveillance of Internet users is by Google and Facebook, I am not sure a whiff of 'Dark Web-bery' is a good idea!
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So please don't just dismiss people for disliking or having problems with something simply because you like it and it works properly for you.