I loved Suicide Squad (the second not the first one), Shazam, and the first Wonder Woman were decent enough.
PeaceMaker series was great as well. DIdn't care for Aquaman, WW 1984, or Justice League
I have not watched any of the Teen Titans or other DC tv series
I really enjoyed The Batman and The Joker movies
The Batman was much better than I expected
However, I am not sure how you tonally/stylistically put them into a shared universe movie
The MCU had it's goofier side like Ant Man or Thor Ragnorok, but they still fit the overall MCU vision they fit into while much of the DC stuff seems to be standalone
I am not sure if Shazam for example could show up in this style of a Batman movie and not take you right out of it
Also, I am not sure you really need to put all these together. I mean Marvel did it, but it also kind of traps them into a formula of sorts. I think I would rather the DC stuff just remain stand alone stories
They don't want to do that though. The strength of the MCU model is that you have a built-in audience for every single film that you make. Doing standalone movies means that you have to appeal to your audience to get them to pay the ticket price. Without some kind of connectivity, they actually have to care about marketing and I think that's what they're trying to avoid. They just suck at actually making decent movies.
I went back and did a rewatch of all the DCEU films right when the Snyder Cut of Justice League released, and then watched Justice League (having previously watched the truly awful Whedon version). And I have to say that, while it's really, really different from the MCU approach...I enjoyed pretty much all of it for what it was.
Could they have been better? Yeah, absolutely. Much better, actually.
But they were still decent and you could see where there was something better struggling to get out. David Ayer's Suicide Squad was enjoyable but felt like it needed an extra 20-30 minutes to really connect the characters better. I'd love to see his cut of the film to see what he's said he was going for. I dug the badguys more the 2nd time I watched them for the kind of vaguely Lovecraftian horror they posed.
WW84 was...pretty uneven, but damn is Gal Gadot charming in the role. I do wish they'd have let Chris Pine go, however. He was fine in the first film, but it felt shoehorned to bring him back. Shazam was also a lot of fun.
All that said, I actually do think the DCEU works better as standalone films or as a multiverse rather than a single universe. The films are just so stylistically different between them that the easiest way to handle it is to just treat them as separate universes when they don't mesh well. Like, Titans has Bruce Wayne played by Ian Glen (dude from Game of Thrones in unrequited love with Dani). He's solid in the role, but how to you fit him in with Ben Affleck
and Robert Pattinson, both of whom were good in their outings (Affleck is BADLY served by the Whedon cut, and plays his role much better in Snyder's cut)? Answer: you don't bother. It's a multiverse. It doesn't need to all fit together in a single continuity.
What Marvel has done is magnificent but I think with their introduction of a multiverse, even they've realized that maintaining a single, sprawling, ongoing continuity is ultimately self-defeating.