I'm really not sure what's so complicated about this.
I have a hard time thinking of legal support EFF has provided that I don't support. If EFF was just legal support, I'd be a donor.
I think their technical work is mostly good; it would be entirely good but for the egregiously terrible Secure Messaging Scorecard --- but hey, that scorecard won me a $1000 bet against Matt Green, so some good came out of it.
Virtually all of EFF's policy advocacy, I find untrustworthy. I don't even believe they take it seriously. I think they play to the crowds, in the hope that the retweets and upvotes will generate more donations.
Is it really that hard for you to see that as a plausible narrative? I'm not asking you to agree with it.