Sometimes we see people who haven't played Borderlands dismiss it outright as like just another mid 2000's shooter based on the style of humor and looks and it honestly makes us kind of sad because the game isn't perfect by any means but Borderlands since its inception has been incredibly diverse and affirming in many ways
Clockwise from the top left are the PCs of Borderlands 1, The Pre Sequel, Borderlands 2, And Borderlands 3.
Among them are Mordecai, a hispanic man (1) who is a major character throughout the games even after becoming an NPC, Rowland a black man (1) who is portrayed as one of the most honorable and just characters in the series, Athena who is a lesbian and ends up becoming an npc and in a relationship with another reoccurring npc (PS), Aurelia who is a black woman and the sister of a major npc (PS), Axton a bisexual man (2), Salvador a hispanic man (2) Maya and Zer0 both aromantic characters and both reoccurring npcs after their game (2), Gaige an amputee (2), Fl4k is nonbinary (3), Moze is asian, likely specifically central asian (3), and Amara is south asian and huge parts of her kit as a siren, including animations specifically using mudras, is based around south asian mythology and culture
There's also a ton of really awesome like Brick the really buff guy from 1 being exactly as huge and into violence as you expect, but also really loving sparkling and pink stuff and being extremely caring about his friends.
Fl4k despite being a robot is the only sentient robot we see that isn't gendered and their story about gaining sentience and discovering identity and what that means for them while being firmly nonbinary is an amazing parallel to discovering and exploring being nonbinary in a world that's not set up for it, but in a context that's not at all triggering and in fact actively affirming for someone whose nonbinary to play
How about some side characters:
Here are three of the main non vault hunter reoccurring npcs. Top is Ellie, she is a fat woman who is shown to be happy and confident and seen as attractive, and the very few times anyone ever speaks poorly about her weight its is both framed as wrong by the narrative and swiftly followed up by retribution, usually in the form of violence. Multiple characters express attraction to Ellie and flirt with her, and she will flirt back and this is played completely straight. If there is a joke about her flirting it is about the fact she is flirting while the PC is doing some type of chaotic violence, never about her weight. One PC, Fl4k has multiple voice lines noting they find her weight specifically attractive.
Bottom left is Sir Hammerlock, an openly gay black man who is the second NPC you meet in 2, is a reoccurring quest giver throughout the base game and DLCs and who appears in 3 and whose wedding is the focus of an entire DLC there. He plays a continuous role throughout the games and he makes references to his past boyfriends and his relationships throughout that time, there is never a question about him being gay and there is never a joke about it.
Bottom right is Tiny Tina, she is a reoccurring npc with some type of trauma induced neurodivergence, I can't be specific because there isn't a label but the game is very clear that she's traumatized and that lead to her having a lot of issues. At various points in the game its shown or mentioned that she deals with things including restricted eating, speaking to voices, mood swings, paranoia, memory issues, and obsessive thinking. Multiple NPCs are shown to care for her and support het and she is also one of the smartest people on Pandora and she is continually treated as such.
Speaking of Tina there is a DLC + side game about processing trauma and grief through playing tabletop games entirely focused around her, that deals with her and her grief over many of the events from the first 2 games. They are amazing and hilarious and heartwrenching at the same time.
There's so much more, the chatter in the main city for 2 is programmed so NPCs are just as likely to be in queer relationships as straight ones, there's also multiple relationships and characters, as well as an entire side series I didn't mention here because this is already so long but these games have so much diversity and representation and heart in them and it kills us to see people just handwave them based on the genre and artstyle.