I've heard a number of people really upset about this Cruz endorsement of Trump.
One said that anyone who insults a man's wife (as Trump did to Cruz' wife, publicly) should never meet with the husband's approval, at least until his public apology is made.
Another said that Trump doesn't need support from turncoats like Cruz. Somehow I don't think Trump is likely to criticize it though, since support is support, after all. I guess some kinds of support can be detrimental, though.
But I haven't seen anyone literally crying over it, like there were when Bernie Sanders caved to Crooked Hillary.