Who uses IE nowadays? 
25% of global users, apparently 
Of that 25%, I'd wager the majority are Corporate users who have no choice in their browser.
Microsoft products have been the major target for every hacker and their cousin since Day Dot. I'll stick with FireFox and AdBlock+...... at least I don't have to wait a week for a webpage to open! 
You need to fast forward about 10yrs

MS went through all that shit in the early XP era. Hence the number of IE (and Windows, for that matter) exploitable flaws are fairly low.
Compare MS's patch Tuesday - a big one this month - how many IE exploitable flaws fixed in the last month (2) compared to Chrome (over 40).
As for speed, IE (actually, Trident) has been the fastest renderer on Windows since IE8 came out, surpassing Gecko (FF) and Webkit/Blink (I hope all Chrome users are using Blink now!!!).
If you can't get IE to perform, you need to do some sensible housekeeping on it, and stop running as a superuser