suggestion of raid

I think,as a event which rewards Totem of Undying,raid has a improper design that players can die and die again without challenging failure, this causes the whole event become too cheap. My friend and i challenge raid and he played Minecraft first time. When we just have iron suit,we win the raid in hard difficulty. After i tell him totem is actually expensive ,He feel raid has a low design .I suggest every wave has a dead time and if you waste time too much, vexes will hurt villagers accurately or the whole event will finish. I play minecraft 6 years and i hope mojang can hear my voice.