Swearing a lot might be a reason, as you can see in the picture i said "Next time i will report u" and thats for swearing a lot such as "Mother f***er" and more, I know there is no such a rule says the CTs can kill the people who are swearing/insulting, but you might made him mad, Demo is better than screenshots.
Also if he Sneaky gets banned, You should get banned too for swearing. Logs can be checked.
and maybe you boosted to the cage, maybe you didnt go from the ladder, thats why the demos are better than SS.