I'm done with this game. I unlocked the main door to the boss room as a short cut, so I went to farm painting guardians for loose humanity. I finally got one, saved at the bonfire on the bottom floor, and my plan was to run up, summon Solaire, and then take on the boss. First it was a miracle I even got to the summon spot because of the stupid giant knights that aggro, and I had to fight the silver knight archer. I get past the archer, kill him, and then summon Solaire. However, the giant knights are still aggrod, so by the time Solaire is summoned, the knights are pretty much destroying him. I run to the fog gate, and Solaire is fucking fighting the knight THROUGH THE FOG GATE while O and S whiddle down his health. He finally decides not to be a dumbass, but by that time he is at half health and easily dies, and I quickly follow.
It is just not worth the effort to backtrack and grind just to beat this stupid boss. It's like From intentionally made Anor Londo the least inconvenient place to get any items while throwing the hardest boss by a multiplier of 100 in there. The game was hard but fair at first, but now it's difficulty seems comically broken, as if it carefully crafted this scenario where you would be hopeless.
Forkball,
Usually people that struggle with S&O are a few levels or equipment upgrades shy of what I would recommend for a new player.
What's your equipment look like? They have a blacksmith right before these bosses for a reason, so upgrade your gear if you can.
Did you venture into the painted world yet? This can be a good place to cover that gap without having to grind, not to mention that you should grab some humanity and new equipment by the end.
Practice killing those Giant Knights, they are slow, but they are good practice for the S&O fight.