Wind Breaker Solved the Tsundere Problem by Veridian
I've said this before, but I only like tsundere when the story does the work to frame their behavior as harmless. When the story takes the time, during the tsundere's introductions, or throughout their entire portrayal, to make it constantly clear, that their outbursts aren't malicious, but just signs of their embarrassed insecurity, I usually don't have problems with them. Hetalia's England and Lucky Star's Kagami are both tsundere that I have no problems with.
I remember that decade of the tsundere trend, when studios/creators very badly tried to emulate Rumiko Takahashi's characters like Akane Tendo and Lum Invader (while often forgetting that Takahashi's leading men characters were also tsundere). I remember when years of Ranma 1/2 anime filler episodes reduced Akane into primarily a slapstick running gag of her being angry and hitting Ranma. Even today, I've seen comments complaining about the Ranma 1/2 remake's season 3 getting sakuga because, (to paraphrase) "What more do they need than girl gets angry, girl hits guy, funny laugh laugh?" As if Ranma wasn't constantly doing things to deserve it, like being rude, saying callous things, and being sexist. (That's why we got that decade of "harem anime" where the leading men were milquetoast, blank slate, "nice guys". Producers of the harem trend wanted the fantasy of a group of girls all chasing after one guy; not a male lead with interesting characterization, like Rumiko Takahashi. "Tenchi Muyo" literally means "No Need For Tenchi".) I remember when Rukia Kuchiki from Bleach got reduced down to another tsundere running gag, in more filler anime adaptations. Anime-Rukia was picking fights for NO REASON, just so the audience could giggle at ridiculous behavior. Nevermind that not everyone finds artificially-induced "drama" entertaining, and some of us actually find it extremely abrasive. The Bleach anime filler eventually sacrificed the characterization of Rukia, from a rounded and unique character with reasonable moments of slapstick, to just an abrasive character, frequently yelling and hitting Ichigo for no reason. Nevermind that the manga's portrayal of Rukia had her hitting Ighigo when he literally needed to be knocked out of bad mindsets, when the story had so much tension that only ridiculous slapstick could break it, or when Ichigo literally said something insulting or offensively stupid (from Rukia's perspective). That decade of trending tsundere very often forgot that these characters that act tsundere are very often REACTING to something so stupid or offensive, that their violence or moments of abrasive behavior is actually REASONABLE. That's why so many forgettable tsundere from that era were so abrasive; they forgot to give acceptable reasons for the behavior.
Otherwise, a tsundere is just an abrasive character, picking fights for no reason, and being violent to people who didn't seem to deserve it. And that's why I hate an abrasive tsundere.
But a good tsundere, on the other hand, is sympathetic. Show me why their insecurity is something to be reacted to with kindness and consideration for their emotional wounds, the fragility of their egos, and compassion for their oversensitive embarrassment. Show me why all thier bluster is toothless and why their threats have no fangs. When England/Arthur Kirkland, Kagami Hiiragi, and Haruka Sakura get portrayed like that, I can't help but focus on their embarrassment, rather than their lashing-out. That's what gains sympathy for a tsundere, in my eyes.