While that may be, if someone expects everything to go wrong, people to dislike them, people to be against them, and to generally have a sh-tty day, week, month, year or life, they usually get just "that" -- not necessarily because of "the law of attraction", but because their mindset caused them to behave/respond in ways that perpetuate their expectations and to be negatively perceived by others, thereby making their interactions with others negative as well.

Consider how easy and enjoyable it is to interact with someone who's genuinely cheerful versus how difficult it is to interact with someone who's a perpetual doomer or someone who hates their life, the world and everything/everyone in it. Regardless of income, social position or life events, the former will have more positive interactions and will usually get more joy out of their lives than will the latter. Again, not "the law of attraction" as presented, but more simply (self-interested) human nature to seek positive experiences and, accordingly, others who enhance those experiences.

Adages and verses such as, "What goes around, comes around," "FAFO," and "Do unto others as you would have them do unto you," speak to this.