It sounds like you are describing burnout. Normally being easily irritated by expected behavior means that one is tired,
Beginners are going to ask the same questions. Some of them will ask for help rather than read the documentation because they learn better through social interactions than through reading. Some will propose ideas that seem good to them but the community has already found them flawed.
When one reaches the point of being easily irritated by known normal behavior, it is time to get out of there to prevent negative behavior. Take some time off from the mailing list. It sounds like you have at least spent 5 years. It could be longer. Take a break. Rest. Ask others in the community to help out beginners.
Beginners are going to ask the same questions. Some of them will ask for help rather than read the documentation because they learn better through social interactions than through reading. Some will propose ideas that seem good to them but the community has already found them flawed.
When one reaches the point of being easily irritated by known normal behavior, it is time to get out of there to prevent negative behavior. Take some time off from the mailing list. It sounds like you have at least spent 5 years. It could be longer. Take a break. Rest. Ask others in the community to help out beginners.