On AU, Edge is slow and cumbersome, and so many problems with text sizing and other things. I rolled back to WP8.1 and was amazed how smooth and almost perfect IE.
On my surface with W10, i can use IE. Is there any way to sideload IE on w10m?
I searched the web but could not find the answer. Sorry. However, I found Monument Browser instead and tried it. It is very fast, support split screen and adblocks. You may want to try it.