Well, for me at least, hate is a really strong word, and I would never use it against any name...yes, even those extremely trendy, kre8tive spelling ones you see all the time.
Aside from the typical cringe-worthy names (Neveah, Messiah, etc) I absolutely dislike the names Megan, Matilda, Margot, and Agatha. That's just off of the top of my head, there's definitely more. Megan has always been an unattractive name to me, even when I was really young. The nickname Tilly makes me cringe, and the -tilda part of Matilda doesn't really help the cause. I really don't have a problem with Margo, I really dont. It's just when there's that silent 't' at the end, I immediately think of maggots, ick. As for Agatha, I just find it super clunky and the -gath- just sounds so unattractive in my ears.
Louise, Monica, and Amanda all have horrible sounds in them (weeze, ick, man) which sucks because i would love to honor an Amanda by middle name but cannot bare it. Hannah, Heather... i dont have an excuse. Just never liked them. Names like Madison, Allison have the -son ending, meaning son of, which is too weird to me. I love Emerie but could never give my daughter the name Emerson. and the made up ones people seem to give children these days... Brinley, Rykley, Kaydasin... shudders
I absolutely despise modern made-up names. I saw a girl not so long ago wearing her cheer squad shirt with her name printed on the back. Her name was TRYNCELEIGH.
There's quite a lot of names I don't like. For some reason I really don't like names starting with b or p except for primrose and paisley. Neither do I like Nina, Tina , Gina or made up names. Also I don't like kr8tive spellings. I also have hard times with names starting with j especially names beginning with jas. Hyphenated names are also names I wouldn't use though some can be very cute. Also using -son names for girls are just a bit weird for me. And I really can't stand Lola, Lila and lulu or clementine or olive. And yes there is still plenty of names that I like ;-)
I have a strong dislike for the name August, even though many people on here love it. I adore Gus, but August is a month, not a name to me.
The Bree sound in names (Gabriella, Brianna, etc) is like nails on a chalkboard to me, as is -ana names (aah-nuh). I love Anna (ann-uh), it's one of my top names, but lose an n to change the pronunciation and it grates on me so much.