I think your firewall rules can be improved upon, i.e. your very first 2 rules are incorrect and will never work as expected, they are the wrong way around.
I already dasbled all the rules, but it did not give a positive resultOr disable rule #7 to check if usage will drop? There are lots of packets "firing" this rule.
Tell me which one?in one case I found a script that was running continuously caused high cpu usage.
15Mb/sYou Choose a frong device for this job,
How fast is your Upstream connection?