Marvel seems largely unaffected by conflicts as far as what ive seen so far. Definitely in the Netflix space. They are loosely agnostic to each other. Agent Carter was fine and in the past. Shield is the only one i havent watched all the way though, so might be some details problems there, even though they share a character. D+ is basically gonna end up solidifying that model as superior in the end id be willing to bet. They went top down with the whole thing, basically bringing the film actors to TV and trying to match film quality. DC is stuck in a mess right now thats not coherent at all because they've rebooted too many times.
DC isn't a mess right now though.
The CW is it's own universe and extremely successful (live viewers is not the metric here).
DC Universe is it's own loose universe, other than Swamp Thing it's been fine.
The DCEU movies are their own universe, except Joker. Wonder Woman and Aquaman are big hits, the films will be fine.
Titans literally couldn't exist if it were part of the DCEU. Arrowverse had a whole lot of worldbuilding opportunities afforded it by starting small with Arrow and no other baggage. You're basically just assuming Disney+ is the superior model despite the fact that DC's TV shows are in a much better place than anything Marvel related. There's no Kevin Feige to guide DC's film universe either, whereas Greg Berlanti is doing a perfectly fine job wrangling all the TV stuff.