Bad genetics are bad genetics, intersex plants are a survival mechanism passed down through 1000s if not millions of years in the plants genes. If something is bred with thai plants theres a very good chance with any stress you will get male flowers feminized or not.
The problem comes from shitty breeders in it for a quick cash grab, all these losers breed are fem beans of other peoples work and most of them suck at what they are doing. Thus you get allot of complaints about hermies or mutants but we would have the same if these fools make regs( or when they do).
Honestly i really only run serious seeds fems when i run fems because of how iniform they are that being said youll almost never find an elite from fem seeds because of this good ones are all mostly uniform and you never get that 1 in a million super elite clone only level of plant that you can find in reg seeds, but you will get a good one. The only way you will ever find anything super elite is running large numbers of reg seeds and keep your eyes and nose out for the one special plant in the group.
If thats not an option i recomend running either serious or kannabia fems, no i havn't tried every brand but these two companies fems have been quality plants, and i have prolly thrown away more that 50-60 strains.