Intuitive UI but a lot of bugs.. Review on Windows 10

I am having dell latitude 3540 laptop which comes with windows 8 pro so installing windows 10 was very hard for me because  first I updated to windows 8.1 and then I updated to windows 10 which takes about 8 hours for me download the full update because my net connection is very slow it is 512 kbps after it got downloaded completely then it shows preparing installation and that was stuck at a place then I searched and I found that a lot of people was facing that so I was searching soluttion for that but didnt found anything then I was reading a post and a person posted a comment that just disable your net connection and it will progress and it really worked so when it installed successfully the windows store and windows edge and xbox  and some apps were not working it was saying that you are not connected to internet but I was connected then I searched the internet and very hardly found one solution using fiddler 4 software and I have to kept it on while I want to use any of those apps and I don't know why but cortana also don't work for me it says change to a language to one which I speak but I am already to english(india) but it don't work so I say it has a lot of bugs so I don't like it I like windows 7 or xp.