Yea, it was me...
1) You wrote my address wrongly (I am glad I did get them thou) - that indicates, how much time you take to send, if even address is wrong
2) all collectors prefere stamp on cover, but USA machine "stamp" is ...
3) more than 50 was still on paper
4) I went over trash (because I threw them away) and I found 17 damaged stamps, that I received from you. Not talking about missing teeth or similar minority, but seriously torn stamps
5) If someone states, that preferes not to receive definitives, you can at least follow the wish. I never gave bad grading because of that, but over 50 (neither on my theme, but old school common USA presidents) definitives is - hm, nothing that we want.
6) If I can try and find stamps on people wishes, even thou I am narrow theme collector - you can do as well, especially with quantity of USA stamps...
7) I consider myself as advanced collector, but still I am doing my best to please people wishes and not being "high flying attitude boy" - how many people do you think will be able to send you USA stamps before 1940? It is even narrower than flora/fauna !
8) you behave as a child being told "You can do better". and I still think the same - "You can do better" for the sake of all people, that will receive your letter and will be disapointed
you should enjoy
(and again my question - when I have issue, it is always USA collectors...)