as much as petty me would have loved to see him torture the DNC some more and expose their bias and crookery, this is probably the right decision, given how little both parties care for the physical well-being of their voters these days. the wisconsin primary should go down in history as a textbook example of how the corrupt political establishment is literally willing to let people die, in order to secure their power - but of course it won't, not in america.
and once again, everyone will hate him for it, the extreme left for not fighting on, the establishment dems for not giving up earlier (you can be sure they will blame bernie again, if their shitty candidate loses against the worst president in history, quote me on this) - and the trump cult will attempt to shame bernie's understandably disappointed supporters into not voting for biden or cuomo, in order to secure the objectively worst possible outcome: four more years of self-dealing, division, idiocy, bigotry, and extreme incompetence.
looks like america simply doesn't deserve a principled, honest candidate, who would put voters above donors. to be fair, someone with integrity and values would not really be a true 'representative' of the majority of the country. in that regard, trump is admittedly a far more fitting image of what america really is.