It does rather make a mockery of "taking back control" from the EU, if -- according to all the Brexiteers on here -- we've given it back instead to a bunch of spineless toads.
Or -- and here's just a suggestion I'm throwing out there -- Theresa May, and the cabinet, who have been entrusted with negotiating our side of the deal, have a rather better idea of what's going on than we do. And, considering how much I think she's a buffoon (mainly for the General Election), that's saying something.
Still, it's not a bad point to make. Liam Fox, David Davis, Boris Johnson, etc etc, all in the run-up to the referendum and in the period after made grandiose claims about how easy it was going to be, and by and large have dropped those claims. Liam Fox talked once about how easy this whole thing was going to be, and Davis then said in a Commons statement that "no-one said this was going to be easy". Pragmatism is taking over the UK side, it seems, even in the most hardened warriors for the Brexit campaign. I'm just throwing it out there, but perhaps if they are "breaking" or "caving in", as you say it, they are simply acknowledging the reality of the situation.
The EU is acting in its own interests. And it holds a great deal more of the cards than we do. Perhaps you should start taking note of what's happening, and rather than lash out at the people you voted for to deliver this, you might care to re-examine whether what you were asking them to deliver was actually achievable. It's looking increasingly unlikely that the "simply walk away with nothing" Brexit is implausible, bad for Britain in the short-term, and would cause severe long-term damage to our diplomatic reputation on top of that.