Well, I've been looking at some of his posts from his post history and deleted posts and in general I don't think his posting is mostly spam, what I do see is that he probably ends up writing some of the posts like the deleted ones to meet the weekly quota, that can appear as quality posts at first glance, but in some cases they are pure garbage. That happens a lot on the gambling section, With the amount of garbage you see out there, many of those who write to cover the weekly quota know that if they write short posts they are more likely to be deleted than if they have a certain lenght. So they lengthen the garbage.

OP, the most likely scenario is that someone has identified you as a spammer and is reporting several of your posts. So worry about writing constructive posts, to the best of your ability, because you will easily get reported if you write garbage posts like some of the deleted ones.

Moderators can sometimes make mistakes, but being several posts deleted, the problem is not the people who report them or the moderators, the problem is that they are garbage.