Case in point: the reception to Disco .vs. Chromatica. Disco has its detractors for sure, but the fan response when it dropped was largely positive. Most fans seemed to think it was a fun joyful album. Chromatica's reception has improved with time, but when the album dropped, it was dragged. Both albums could have used more effort and both albums needed way more oomph in the production department, but Chromatica IMO clearly is superior in terms of lyrics, vocals, general songwriting (despite having a much worse lead single than Disco) and got a much worse PJ reception. Which indicates to me that Gaga is actually treated more harshly. Her fanbase gives her way less margin for error than Kylie's does.
I think you overlook intention there? Kylie presented DISCO as a carefree homage to her favourite disco sounds; Chromatica had Gaga’s fans expecting a house masterpiece drawn from the trauma of addiction and grief with an overarching alien conceptual universe and got… that. And lots of make-up ads.
The point being: Kylie pretty much always delivers what she sets out to (Kiss Me Once really standing out in retrospect as an album/era which wasn’t offering anything really clear at all, hence the general indifference, probably) and while her fans may wish she would offer edgier things, they really don’t have the same justification to get narked at her.