Hey there!
First of all, I understand your frustration. I, myself, play a lot on KitPvP, get in touch with tons of hackers every day, and get frustrated after some time. It does seem like the staff aren't doing anything, however, they are trying their hardest. To add, they cannot be online 24/7, as they have other commitments in IRL and sometimes they have to put their focus on that. Also, there's currently a shortage of KitPvP Staff, so if you feel like or want to help out, don't be shy and apply for the position! There definitely is an anti-cheat, it could use some work (or a new one) though, but it certainly does its job, even if it is not as efficient as you may think.
To get to the main point, how can you support KitPvP Staff when there are tons of hackers around? I know it's something you and other players hear all the time, but please use /report and /helpop to report hackers, it gets passed on to KitPvP Staff if they aren't online. Another thing I would suggest is to record the hackers and put the video in #reports on the discord or in a player report on the forums, it makes the life of the KitPvP Staff much easier. These are some tips/suggestions I can give, but I honestly encourage applying for staff.
Sincerely,
Lavendel