Wonder Woman from the DCAU gets far too much flack from people on here.
This was Wonder Woman's first major appearance in media since the Linda Carter show. Despite Bruce Timm running into legal issues with the character, he was adamant that she be used in the series, and helped re-introduce a character who had previously been ignored for a long time. I still remember when the pilot episode first aired some fans complained about WW stealing her armor and running away from home. But everyone was perfectly okay with that 15+ years later when the same thing happened in the live-action film.
It should be said that Wonder Woman is a hard character to write. She's a warrior, an amazon, an ambassador, a compassionate and calm person, etc. There's a bunch of stuff in her character. For a lot of writers, finding the right balance for her can be tricky. And there's many people who have a different idea on how Wonder Woman should be like.
There were some episodes in the Justice League show where Wonder Woman just seemed like an angry brute such as Fury, Eclipsed, Hawk and Dove (though I'd argue that was the point in that episode).
And yet, there were several episodes of JLU which characterized Wonder Woman excellently, and showed her compassionate side such as Ultimatum, Maid of Honor, Tabula Rasa, and To Another Shore. I feel it's important to keep in mind that a fair chunk of episodes did get her character right.
Is this a flawless portrayal of WW? No, overall I'd say it'd mid-tier, there's better and worse versions of the character out there. I'd say in the show itself, Wonder Woman suffered from inconsistent writing, but there were several episodes which got her right as I've mentioned. It's frustrating when I see people on here gloss over that so they can preach their one sided narrative.