Barbara's run as Batgirl was pretty bland through and through. TKJ and Joker shooting her/crippling her was the highlight of Barbara's time as Batgirl, I'd argue it's the only memorable story DC wrote for her unfortunately. So they keep coming back to it...because that's all there is for Barbara-Batgirl. Her characterization at the time was just horrible. There was barely any reason why she took up the mantle, she didn't have much of an identity. Nothing fueled her to be Batgirl, I'm still trying to figure out who actually asked for Barbara to take up the cowl again TBH.
After TKJ and she became crippled the writing of her character and her characterization increase soooo damn much as Oracle. She realized that her being Batgirl was a waste of her time and skills and that she could do much more and was more powerful as Oracle. She realized that she didn't need Bruce to do her job, and it got a point where Bruce came to her for help and not the other way around. Her fuel was the incident with Joker and the result of it. She battled PTSD, her own doubts and insecurities came rushing to the surface, she started becoming bitter towards other people who wanted to help her/love her. There were times she resented other members of the Batfamily.
As Batgirl, DC made Barbara too "perfect". She didn't have any real major flaws, but at the same time she didn't have anything fueling that perfection. It was literally "I think Batman is cool and I want to do that too!" as her point of origin as Batgirl. Sometimes she had a lover's spat with Dick but that was it. This is also why many people think Stephanie was the better Batgirl than Barbara specifically because Stephanie wasn't perfect. She started her life of crime fighting the same way. She saw Batman, thought it was cool and was like "me too" but she didn't become Batgirl, she became Spoiler first then Batgirl and she had major shortcomings as a hero. She made a bunch of mistakes, got frustrated, got impulsive, went against orders, got many people harmed or killed indirectly. But she continued to put on the gear because she wanted to prove she could do it that she was fit to wear the cowl. For many people that's what made/make Stephanie great. For many more that's why they think she's a horrible character and worthless Batgirl.
Fuck everyone who requested Barbara be batgirl again and fuck DC for making Barbara Stephanie all but in name.
Only the shitty writers will.
That would be Batwoman.