lol ok a few things here
1) Mainstream media has never been "scared shytless" of Warren. If anything, their relationship with her was one of inattention or "superficial" interest ("Nevertheless, she persisted!"), but not conflict. But now that's she's getting the attention and exposure that comes with running for President, she's not being received as poorly as Bernie because her personal political style is more open and accessible than Bernie's. While they both foment class anger, Liz's approach is to redirect it with surgical precision to bad actors, where Bernie's is to take more of a sledgehammer approach. There are pros and cons to both approaches, but just in general, she's more likeable and charming than he is (although his curmudgeonly disposition can have its own charm to the disaffected). Look at how Bernie interviews. He almost always seems irritated, like he's been forced to interact with the press. To the fringe/dirtbag left, this is a feature, not a bug. They have (earned) distrust of the MSM, so seeing someone be borderline rude or dismissive to journalists is a sign of solidarity. Warren being generally likeable means she must be a tool of the establishment. It really doesn't go further than basic high school lunch-room politics. Liz doesn't sit at the burnout table, so she's treated with suspicion. But the idea that Warren can be turned into a tool for the elite/establishment seems as ridiculous to me as Bernie being turned. They've both made their entire political brands off of fighting the elites on behalf of the rest of us. What is the fear that President Warren would do? Turn around and nominate Timothy Geithner or some Wall Street dude as Secretary of the Treasurer and all of a sudden become a friend of the banks? Nominate some neocon as Defense Secretary and invade Iran? It makes as little sense as a President Sanders doing so. Warren deserves to be pushed to make her foreign policy as robustly leftist as her domestic policy, but I think her history has earned her the right to forgo the neoliberal fearmongering.
2) Tulsi has near zero recognition amongst the MSM (or the actual general population for that matter), so the idea that they're "destroying" or "going hard" on her is weird. No one is scared of Tulsi Gabbard, she's an oddity. Mike Gravel is more of a threat. It will be interesting to see what she does on the debate stage, but she has some skeletons in her closet that could neuter her approach if she tries getting froggy.
3) Warren has the most progressive campaign finance position in the entire Democratic field. No Democrat has pledged to not take corp/big money in the general election, but she's the only one who has pledged to not take corp/big money during the primary as she builds her campaign, and is following through on her pledge. She's repeatedly mainstreamed the importance of eradicating political corruption and said that would be the absolute first thing she would tackle as President, because no other issues can be worked on if the influence of money in politics remains as large as it is right now. So if you believe, as she does, that serious change cannot be made with money in politics, then I would imagine you'd be pretty open to supporting her.