guys is it possible to report an user

i don't think so, the only option is block

report their comment or something

https://www.mangago.zone/home/photo/12536386/ here is how to report a user

Yes there is,
You can report their account, by going to the reporting section or
You can report their comments

you can email webmaster

sorry for necroposting, but you can report them from wherever you found them.
example:
-Question section on the home page: just report their comment and that person at the same time
-Specific story(ies): like maybe you found this annoying person in the comments of a story, report them using the flag button that floats. put their user and report them.

although you need to copy their profile link or number.