The Gemara in Bava Basra says that 90% of people are in the cemetery due to ayin hara. That doesn’t mean that they wouldn’t end up there anyway, thank you nachash (also Bava Basra).
The gemara talks about zugos, and says that if you’re not makpid, then it won’t bother you. That’s because zugos brings on SH’Ds. They don’t like it when you obsess over them, so they come and get one who is obsessed, when he trips up.
That is not ayin hara. That has a power to be me’orer kitrug, whether you pay attention or not.