Im sorry to hear that you have this problem, but I dont experience it.
I think they have said that they nerfed axes, since they do a little too much damage! That can be a reason why it doesnt feel like youre dealing any damage!
And if you get killed in 3 hits while they are spamclicking, please try to record it next time and submit a big report (here:
https://reports.cubecraft.net/bug_report) because that is not what is suppose to happen I think.