Same for me, took me 2 hours of Windows 8 use to stop instinctively moving mouse to bottom left of screen. Personally i hated the legacy start menu, was a horrible unwieldy mess made worse by publishers being inconsistent with their naming of program group folders, plus all the unnecessary shortcuts to uninstall, help, links to website etc etc. When you have a lot of apps installed it became a scrolling nightmare and needed constant management to cut/paste shortcuts from one program group folder to another or to rename folders. I just stopped using it years ago. For anybody who struggles to change the way they launch an app, 8.1 gives them very similar to what they had before except that its fullscreen. For those that categorically refuse to accept this, then theres plenty of free and low cost Start Menu apps that replicate Windows 7 Start Menu... you have a choice.
I use Windows 8 desktop pc's (3 at home), Surface RT tablet and Lumia 920 and i love having the UI familiarity, integration with MS Cloud Services and all my stuff syncd across the 3 platforms. The only chore i have now is having to use Windows 7 at work, whilst it was excellent and still is for most peoples needs, i cant stand the sight of it anymore. What i dont miss is any of the Google services (i used to think irreplaceable) since i cut the Google umbilical cord. Most of the negativity i have read in comments under click-bait articles about Windows 8 have been from people who are anti-MS, dont use Windows 8 and have a brand loyalty to Apple, Google or Linux.