does Phenylephrine HCl do anything?
It helps reduce the turbinates in your nose to allow more air into the nasal passage. Tutbinates are air filters in the nasal passage aiding in the reducing of dust, pollen etal that enters the nose. It should be used as a temporary solution. Overuse of Phenylephine HCI can actually cause a reverse action and the turbinates grow/swell back up and cause iritation or breathing problems. Some serious breathing problems are relieved by a medical procedure called 'turbinate reduction', though the turbinates can grow back months later and cause a repeat of the sinus problems.
Here's a good site explaining this procedure.
https://www.entkidsadults.com/turbinate-reduction/
OP needs to see an ENT specialist and discuss the various options for relief of his nose situation.