Anyone else find Rayvis fight weirdly easy compared to random planet bosses like the various monsters and bounty hunters?

I just finished the mission on the shattered moon and had the duel with Rayvis. It barely took any effort or stims to take him out. He was easier than many of the bosses and bounty hunters on Kobohs optional side stuff for sure. I've spent so much time on side stuff that I wonder if I'm overpowered for the main missions now.

Edit: also, can anyone tell me roughly how far I am in the game, as in, halfway through, 2/3 through etc.? I don't want this game to end which is why I do all the side stuff.