I'm having zero issues with Windows 10. I personally think that Microsoft got imporved themselves a lot in these recent years and they perfected their Windows with Windows 10 being the best Windows we have seen so far. Start is very customizable and great. They are also doing their best to implement dark theme everywhere and we even got Windows explorer dark which is something I was complaining a lot until Microsoft finally released it. In general, customization in Windows 10 looks pretty good. You can even set your own color for mouse pointers and I'm saying nothing about colors for taskbar and other things... Windows updates also got imporved a lot. We no longer have issues where Windows is forcing itself to restart because of update or bugging you to restart it. You can set reminder when it can remind you and how and when it should do updates. I'm also having zero issues with their "bloatware". In fact, I'm using some of them and they seem pretty solid. For example, pre-installed "Mail" is very reliable, solid email client that supports multiple accounts. I have added there both my Microsoft and Google emails. Windows weather pre-installed app is also useful. I don't need to go on specific websites now. Only thing is needed to launch my start and check the weather there. Windows OneNote is best notepad app I ever seen. I don't need to mention a lot of features it has, just check yourself. Heck, it even supports password protection of your separate sections. Also, I need to mention lack of bugs and glitches unlike previous Windows versions. Windows 10 is also better optimized for SSDs. It automatically detects it. Something that previous versions didn't have. Task Manager is also more complex, showing us more details, even temperature of GPU and many other things. Storage is also improved and they added "Storage Sense" which is something new that we didn't have with previous versions. Windows 10 is also better suitable for gaming. It even has Gaming bar that lets you capture videos in games. They also made Windows reinstalling easier, by just resetting PC with one click in settings. Sign in option also got improved by a lot in Windows 10. Not only it got more secure, but also supports pin, where you can easily login with just PIN. Some interesting pre-installed features are "Your Phone", where you can link your phone with your PC and get not only SMS, but also notifications in your PC. I also like how they created their own Store like Google's Playstore, but for Windows. The only thing I don't like about it, is the simplicity of those apps, that seem more simplified and optimized for tablets (I usually like complex apps and softwares. For example instead of Microsoft's Grove Music player which is quite simple, I use more complex and probably the best music player - MusicBee and for videos I use Daum Pot Player). Also, I need to mention their browser Edge. They improved it a lot. So much, that I was seriously considering to switch from Google Chrome to Edge, however it still doesn't support one important feature for me (sync through multiple devices) yet! (coming soon). New Edge is no worse then any modern Browser. I also like "Feedback hub" in Windows, where you can give your feedback to Microsoft. I use it quite often to give them my feedback about suggestions, problems and etc...
I could talk a lot about advantages (over previous Windows versions) and my positive experiences of Windows 10... Overall, my point is that, in my opinion Microsoft along with their Windows got improved hugely in these recent years.