Same problem, here for about a week now ever since the limited time mode King of The Hill was live. I can play TDM but nothing else.
Tried all the usual fixes. EA App Recovery worked once then the problem was back again. I performed all the fixes you did except low graphics settings. It's clearly something EA/DICE have created and I'm sick and tired of messing about looking for fixes. And they emailed me asking why I wasn't buying BF6! LOL! My advice to anyone reading this is to never pay more than £5 for any EA/DICE game - that is a policy I stick to.
