Sashauwu, you made the right decision to find a new Dr. I don't think it's ever appropriate for a Dr. to casually dismiss patient complaints. A good Dr. should always listen patiently to such complaints & whenever possible, consider prescribing a different med with fewer side-effects, or at least adjusting the dose, and also consider adding a 2nd Rx that might help with the side-effects. Of course, it gets pretty tricky to prescribe multiple drugs for a particular problem, but if done w/ caution, can work out for the patient. Good luck going forward, I do understand how distressing this can be...
Sorry you are experiencing this. So, Haldol can indeed impact one's sexual self. Believe it or not, some people have an increase in sex drive but most do have a decrease and it is moderately common. Are you actually facing impotence though? That is another potential side effect.
What is tricky is that mental health in itself can cause sexual side effects. Do you take Haldol for a particular diagnosis such as schizophrenia? The other issue with an antipsychotic medication is that one has to weight risk to benefit. That means side effects to the needs of having the medical issue treated. I don't know the severity of whatever it is that caused the prescription of Haldol. But it could be that your doctor is not really blowing off your sexual concerns but weighing if the benefit of being on that medication outweighs that issue. However, that is not really doing you justice and treating the whole patient and all of their needs. Having sexual side effects like this can impact your relationships, so I understand it is important. And clearly it impacts your compliance for taking it.
Since this side effect is not uncommon, I would ask your psychiatrist for more help in dealing with it. Check to see if there are any tricks. Completely stopping your medication is not ideal and please do not do that. But perhaps there is timing of dosage, temporary dosage adjustments, etc. that could be utilized to improve this. Adjunct therapy perhaps as well. And another option is choosing a medication less likely to result in this side effect. There are some that have a lower incidence of sexual side effects.
Here's a pretty good article about it: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3623530/