all this takes a overhead with ure tx rate.
try without wifi protection u will get consistent full max

basically i am telling u anything u set in ure router to add firewall/qss/protection etc all takes a percentage of ure bandwidth.

hmm ure problem is ure snr margin is bad.
Call them and ask whats the reading. Its suppose to be between -18 to -28 afaik.

also it looks like u have a loose cable somewhere or a broken glass in ure cable.

since fibre glass is inert and it doesnt emit any form of magnetism on static environment like a rainy day.
so its more on movement of the wire.

technically the only way in fibre glass wire to get affected by rain is
1. Broken Glass in ure cable
2. Loose cable
3. Exposed cable

i would check on this.

when u call tm ask them to check ure margins at different times.

ok .there is a snr margin according to the tm when i asked them. thats where i got the number from

well then something is going on with his connection then.

u Know until now i dont even know y they bite the wires.

personally i think because of heat. but on Fibre.. theres no heat right?? so technically it shouldnt.

they said above 18. so u can complain