I have tried Nagios, zabbix, netdata, grafana and all the possible combination of Monitoring system... but still cannot find anything like PRTG.. am i the only one suffering by this? i mean the functionality of PRTG and the installation process are unbetable.

No conf file, no database or apache or rules, is just simple as it should be.

All the rest seems to be hard to maintain, condfigure and make it work.