For many, if not most people it is. While seven fixed most of vista's epic failures to tolerable levels, it still contains quite a few.
Now you can in fact nullify most of the failures that are retained, largely using same software that helps nullify much of win8's fails, namely classicshell. But it's still worse, and personally I'd still be happily running XP if not for lack of proper 64-bit support (specifically lack of hardware drivers for 64-bit version of XP) and lack of DX11 ('m a gamer).
Other than those two features, XP is clearly better in my experience. I don't even mind EOL. I had a workstation in personal use that ran vanilla unpatched XP until well past XP SP2 age because windows update borked itself so hard on the system, it couldn't be updated. I just kept the infection vectors secure and it was fine. I.e. solid firewall, solid anti-virus software, up to date 3rd party software that could be used as infection vectors, no suspicious flash drives and so on.
Not a single virus. Hilariously, when I got myself an XP2 slipstreamed disk I forgot to unplug internet connection before installing. That machine got owned before I could install firewall software. I had to format and reinstall. But vanilla version with up to date firewall etc? No problems whatsoever.