Remember: Marginalized people are not a monolith and not everyone considers the same things offensive and/or problematic.
When in doubt, listen to marginalized people instead of those who aren't marginalized.
I'll use simply the names of the marginalizations that are portrayed badly in most of the cases. Not all examples listed are necessarily -phobic or -ist but cases of very inaccurate/offensive representation. I tried to reflect that through the way they're labeled, but feel free to correct me!
* for reviews by people who do not have the marginalization, everything else is reviewed by people with the marginalization rep they're critiquing.
Arnold, David - Mosquitoland (Native American: Cherokee)
Aslan, Austin - The Islands at the End of the World (epilepsy + seizures)
Banks, Anna - Nemesis (Egyptian*) 2*
Bardugo, Leigh - Shadow and Bone (Russian)
Barr, Emily - The One Memory of Flora Banks (memory-related chronic illness)
Bjorkman, Laura - My Invented Life (bisexual + biracial)
Blume, Judy - Deenie (scoliosis)
Bowman, Erin - Vengeance Road (Native American: Apache)
Brugman, Alyssa - Alex As Well (intersex)
Carson, Rae - Walk on Earth a Stranger (Native American: Cherokee)
Cast, P.C. - Moon Chosen (biracial + Native American + Black) 2 3* 4* 5*
Cherry, Alison - Look Both Ways (biphobia) 2* 3
Clark, Kristin Elizabeth - Freakboy (non-binary + trans)
Cozzo, Karole - How to Keep Rolling After a Fall (wheelchair user*)
Drake, Keira - The Continent (people of color)
Eve, Laure - The Graces (racial slurs + biphobia + homophobia ) 2 3
Fitzpatrick, Rebecca - Black Ice (abuse romanticization)
Golding, Julia - Young Knights of the Roundtable (wheelchair user)
Grant, Michael - Gone (Native American: Chumash + Autism)
Green, John - An Abundance of Katherines (Muslim)
Green, John - The Fault in Our Stars (pediatric cancer)
Gregorio, I.W. - None of the Above (intersex*)
Hamilton, Alwyn - Rebel of the Sands (Middle Eastern + Muslim) 2 3 4
Harrison, Rory - Looking for Group (transphobia)
Hattrup, Karen - Frannie and Tru (depression*)
Henry, Emily - The Love That Split the World (Native American) 2
Hoover, Colleen - November 9 (OCD* + abuse romanticization + rape culture + homophobia*)
Houch, Colleen - Tiger's Curse (Hindu*)
Howard, A.G. - Splintered (Black*)
Jordan, Sophie - Reign of Shadows (blind*)
Kinsella, Sophie - Finding Audrey (social anxiety)
Kristoff, Jay - Nevernight (Maori)
Kristoff, Jay - Stormdancer (Japanese) 2* 3* 4* 5* 6* 7*
Landy, Derek - Desolation (homophobia*)
Larsen, Jen - Future Perfect (fatphobia)
Meyer, Marissa - Cinder (Asian)
Michaelis, Antonia - The Storyteller (abuse romanticization + rape romanticization) 2
Niven, Jennifer - All the Bright Places (depression)
Pacat, C.S. - Captive Prince (abuse + rape fetishization + homophobia*) 2 3
Rankin, Rutherford - Fighting Against Gravity (transphobia* + homophobia*)
Roth, Veronica - Carve the Mark (people of color + chronic pain) 3 4 5* 6*
Rowell, Rainbow - Eleanor & Park (Korean)
Rowell, Rainbow - Fangirl (anxiety + bipolar disorder)
Schmidt, Tiffany - Hold Me Like a Breath (immune thrombocytopenia)
Shannon, Samantha - The Bone Season (romanticizing slavery)
Shields, Brenna - Poison Kiss (Indian)
Sutherland, Krystal - Our Chemical Hearts (posttraumatic stress disorder+ cane user + limping)
Skye, Evelyne - The Crown's Game (Russian)
Stirling, Tricia - When My Heart Was Wicked (Native American*: Maidu)
Stone, Tamara Ireland - Every Last Word (OCD)
Talley, Robin - As I Descended (biphobia* + Black* + Latinx*)
Talley, Robin - The Lies We Tell Ourselves (Black)
Talley, Robin - What We Left Behind (trans* + genderqueer + biphobia*) 2*
Thomas, Leah - Because You'll Never Meet Me (blind)
Tregay, Sarah - Fan Art (gay)
Tucholke, April Genevieve - Wink Poppy Midnight (racial slurs)
Watt, Erin - Paper Princess (abuse romanticization + slut shaming)
Yoon, Nicola - Everything, Everything (severe combined immunodeficiency* + chronic illness)
Young, Suzanne - The Program (depression)
Obviously this is a database and may contain different takes on these books. But when a marginalized person tells you (a non-marginalized person) that a book that represents their identity is offensive - listen.
As always, marginalized people are not a monolith. When in doubt still listen to them unless you also have the same marginalization and may feel differently.
This list is far from complete, but I'd love for it to become a comprehensive resource.
Feel free to comment with a link to a review of a book that you consider problematic (and that details why the book is problematic) and I'll add it. Make sure to mention whether you have the marginalization if it also features bad rep!
More Book Blogging Tips:
Are You Awkward About Getting Review Requests from Authors?
8 Tips to Get Motivated to Write Blog Posts
More Generous Ratings for Indie Books?
More on problematicness:
Should We Separate Authors from Their Problematic Work? On False Representation and Whether Authors Deserve Call-Outs
Do We Owe It to Authors to Call Out Problematic Books "Nicely?"
How to Enjoy A Problematic Book and Not Be a Jerk About It
Emergency Help When You Have to Review a "Problematic Book"