It's not only you. With the last version I keep getting pages that only load by half or not at all. Sometimes I get so annoyed I go to Firefox, but I don't like it either.
I'm not sure about the "worst", though: I think that Address Book / Contacts has always been a great contender (and just got worst with th iCloud integration).
No suggestion, sorry. On the Contacts front I've writen to Apple, but to no avail.
Safari just keeps getting worse and worse . . . won't do anything on YouTube . . . click and click and click to enlarge the window to full screen, no response . . . lags 20 seconds behind every command you send it, including Force Quit . . . honestly, Safari is the worst piece of software I've ever had the misfortune to use, bar none.
Apple should be strung up and shot for this misbegotten stepchild of Windows' b-------d son . . . to even dare call it a "browser" is a vast, galaxy-wide misnomer . . . I can't believe no one is raising a bigger stink about it. The only reason I keep using it is that all my bookmarks are in there and I dislike Chrome and Firefox's interfaces . . . Safari's interface looks great but does NOTHING well.
I swear, I'm getting more and more disenchanted with Apple after staying with them for almost 30 years now. If there were ANY alternative except Windows I'd be there in a flash. How they can keep this shoddy piece of %$^& out there . . . oh, wait, I forgot iMovie and iDVD, didn't I? Silly me. How does one take a perfectly good program like iMovie circa 2005 and turn it into a useless chunk of steaming dung in only 7 years? A company is supposed to IMPROVE its software, not change it into unrecognisable gibberish just because they need to keep 1,200 software developers from twiddling their thumbs.
Steve, ya really made a mistake on me, bro', by dying. I'm just going to have to drift away from Apple. Trouble is, I can't find a Dark Side . . . could someone please invent one?