The processes you are seeing are normal. eventlircd is needed to translate the devinput event into lirc events for kodi.
As for your observations: this sounds a bit like you have wireless reception problems with the receiver - to weak signal or interference. Try to move the wireless remote receiver to some other location and also try replacing the batteries in your remote.
Other than that the ati_remote kernel module seems to have 2 parameters you could try playing with, repeat_filter and repeat_delay. Not sure what they actually do, just noticed these in modinfo
# modinfo ati_remote
...
parm: channel_mask:Bitmask of remote control channels to ignore (ulong)
parm: debug:Enable extra debug messages and information (int)
parm: repeat_filter:Repeat filter time, default = 60 msec (int)
parm: repeat_delay:Delay before sending repeats, default = 500 msec (int)
parm: mouse:Enable mouse device, default = yes (bool)
Create a /storage/.config/modprobe.d/atiremote.conf file like this:
options ati_remote repeat_filter=XXX repeat_delay=YYY
so long,
Hias