Hi,
All your issues are related. As you not able to satisfy yourself and your partner your interest for sex have also been decreasing.
All your above mentioned issues are in a way related to each other. I also believe you have been Masturbating in your past as well.
When a person is not able to perform he seem to lose interest in having sex as even after he performing the act he is not personally satisfied. Same is the case with you. Though you doing it but after the act you personally not satisfied with your performance due to your Erectile dysfunction issue and premature ejaculation issue.
It is observed that almost all patients that suffer from erectile dysfunction also face timing issues i.e. premature ejaculation (when you don't have control over ejaculation also called early ejaculation). Premature ejaculation is when a person gets a discharge in 1 minute or less after penetration or any other sexual activity.
PE might not be a cause for your worry. It can be frustrating if it makes sex less enjoyable and impacts relationships. But if it happens often and causes problems like you fail to get another erection then it's time to see a sexologist. Since an erection goes away after ejaculation, it is difficult to know if the problem is Premature ejaculation or Erectile Dysfunction.
However there are medications and treatment available to resolve your issue. Rest assured your problem can be resolved.
Next Steps
If you genuinely interested in getting your issue resolved then you can contact me either online or in person. Would be happy to help you.
Website Link - https://www.drfayyazsexologyclinic.com