New Public IP to avoid DOS / Packet Loss

Hello, 

I am running my internet with NightHawk C7800 router/modem combo. I have been noticing a lot of packet loss (10%) , and loss of performance during streaming and online gaming.

Upon checking my log i noticed a variety of DOS attack happening throughout the day. I honestly dont know if the DOS attack reported are the root cause of the packet loss (maybe the router gets overloaded?).

I tried mutliple time working with my ISP (spectrum) they say they dont see any signal issue on their end, they reprovisioned the modem multiple time still same thing. 

One of my thinking is to get a new Public IP to (hopefully ) removing the DOS attack all together and see if that improves performance. Spectrum tells me there is nothing they can do and i should contact NetGear. I tried releasing the IP , leaving the modem without power for a few hours but i still pick up the same ip. 

I feel that Spectrum is giving the run around and they probably the only one who can change my public IP.

Anyone knows how to make it happen?

Not sure if that s related but i am also seeing a bunch of weird error upon start up: