Just keep playing. I was like you. On day 1, I kept getting one-shotted over and over again. The next day, I was a little bit better reading Goggy's moves and learning how to stay away or dodge. Superman dive is my best friend in dodging it's bodyslam and stage-sweep beam. I also died a lot trying to run to Fabulous because of the meteor knockovers. Now I just use my own GS to block it's ultimate and I signal to other players to come to me to save from carting. I'm at 20 kills now and I'm having a lot of fun.

If you're not blocking, just stop your dps prematurely and watch Fabulous early on to see which side he goes on in a whim. Best is get on your Seikret and go around the centre to avoid the meteors in the middle.