I have gone through your description. The itch is a common symptom and could be due to many reasons including wax, habit, allergy
, infection and other causes. The occasional blocking of ears could also be due to various reasons including wax and sometime eustachian tube issues. The hard of hearing issue could seems related to nerve
(and hence not related to your above symptoms) as you miss what people are saying in crowds etc . All of these depends on multiple factors including age and there body conditions.
It is advisable for you to visit an ENT specialist
for a thorough examination.