Even if it survives the next three months teetering on the brink of bankruptcy, Greece may have blown its best chance of a long-term debt deal by alienating its euro zone partners when it most needed their support. Prime Minister Alexis Tsipras’ leftist-led government has so thoroughly shattered creditors’ trust that solutions which might have been on offer a few weeks ago now seem out of reach. With a public debt equivalent to 175 percent of economic output and an economy struggling to pull out of a six-year depression, Athens needs all the goodwill it can summon to ease the burden.