pmTotNoRrcConnectReq shows the number of RRC requests, not the failures !!
Of course pmTotNoRrcConnectReq is very high, it represents all the RRC requests in your cell.
The failures are shown by the difference between pmTotNoRrcConnectReq and pmTotNoRrcConnectReqSuccess
You can also find all the subcauses of failures below :
rrc denied adm
rrc fail after adm