Multiple DDoS Attacks + Internet Freezing Every 30 Seconds

I am getting anywhere from 3-10 ddos attacks per day, multiple of them coming from the same IP, and it's happening every day, and it's really annoying. I've tried installing some free VPNs and DDoS protection programs, none of which are helping. These 3-15 attacks I have to deal with each day are stored in my Netgear router logs, and here's one I had a few days ago.

[DoS attack: FIN Scan] attack packets in last 20 sec from ip [104.73.189.44], Wednesday, Feb 10,2016 10:53:54
[DoS attack: FIN Scan] attack packets in last 20 sec from ip [23.3.98.26], Wednesday, Feb 10,2016 07:45:56
[DoS attack: FIN Scan] attack packets in last 20 sec from ip [104.73.189.44], Wednesday, Feb 10,2016 07:40:13
[DoS attack: STORM] attack packets in last 20 sec from ip [98.188.116.2], Tuesday, Feb 09,2016 13:42:16
[DoS attack: STORM] attack packets in last 20 sec from ip [98.188.116.2], Tuesday, Feb 09,2016 13:41:01
[DoS attack: STORM] attack packets in last 20 sec from ip [98.188.116.2], Tuesday, Feb 09,2016 13:40:40
[DoS attack: STORM] attack packets in last 20 sec from ip [98.188.116.2], Tuesday, Feb 09,2016 13:40:20
[DoS attack: Smurf] attack packets in last 20 sec from ip [5.246.97.255], Monday, Feb 08,2016 15:19:02

Not only that, but whenever I'm playing CSGO or Minecraft, my internet freezes (including voices stopping in teamspeak, skype, mumble, etc), and it happens every 20-90 seconds for about 2-6 seconds, and sometimes there's a tiny 1-2 second freeze following that.
I'm not sure how many of you play competitive Minecraft and CSGO, but if you do, you know how much a ping spike or huge internet freeze can cost you your game sometimes, and this has really been pissing me off.

More info:
My internet is Time Warner Cable (live in the middle of nowhere), my router is a Netgear WNDR4500v2 which I got before all this happened. Originally when I got the router, I had no lagspikes, or at least none that was like this. Then I got another modem, and then there was some lag every few minutes or so for like 2 seconds which wasn't that big of a deal, I really only noticed it in CSGO, but a week or so ago, I got a new modem, and it was fine for a few days, until it was like 4 or so days ago I started getting the issue I described above.

Any help would be nice, I've tried factory restoring my computer, and I've made sure no games or software is updating in the background, but no luck.If needed, I can give more info on the issue, and my software/internet, etc.

This post is similar to my issue too: https://community.netgear.com/t5/General-WiFi-Routers/WNDR4300v2-lag-spikes-every-20-30-seconds/m-p/1027228#M60407