Your tank is very poorly stocked. For example:
Kuhlis require groups, as do tetras. So your fish are not in proper schools.
Bettas are not community fish and females can't be kept with males. A single female is only introduced to a male betta in their own tank when they are ready to spawn.
May I ask if you've done any research on the species you have?
Your tank is also too small to have all these fish, when in proper numbers.
75: blood parrots, featherfin cat, emperor tetras, turquoise rainbowfish, BN plecos, japanese trapdoor; 46: WCMM, gold inca snails, ghost, bamboo & amano shrimp, kuhli loaches, rummynose & ember tetras, endlers, platies, flame gourami, guppies; 16: pygmy, peppered, loxozonus corys, otos, assassins, RCS ... ~ Research PRIOR to purchase.... ~