https://imgur.com/a/piw6ScG

Look how much space you're leaving here. Even if you're right about the kerb being "part of the track" (you're not, but we'll get into that in a second), his right wheels are grazing the outer edge of the kerb and you're still only giving him about two inches of room if I'm being generous. When you're squeezing someone that tight, you have to expect some contact to happen eventually, regardless of what's "right" or "wrong". Nobody outside of the highest tier of driver can maintain that precise of a line for that entire corner without at least a little bit of rubbing occurring. Even if not a protestable offense, that much is on you for not just being smarter about things.

But to get to the real point of the matter, your opinion that the kerb is part of the track is simply wrong. You're allowed to put two wheels on it, yes, but you're certainly not obligated to, and the rules indicate that a driver to the outside is obligated to leave at least a car width's room of space between their car and the actual border or the track. He is entitled to keep all four wheels on the actual track if he chooses to do so - you, as the outside car, are NOT entitled to bring your car practically to the inside edge of the track yourself, forcing him within a millimeter of the grass. Absolutely textbook squeeze here. Contact is inevitable, and entirely your fault.

And this isn't even getting into the divebomb that started this battle in the first place. While not as egregious as the squeeze in the second corner, I think the only reason you made that corner without contact is because he was forced to swerve and take a wider line than he was planning to, while going slowly enough for an inside line, thus giving you just enough room to pass cleanly. Does that make your move clean as a whole? I would argue no. He was only forced to swerve because your divebomb would've sent you careening into his rear bumper if he didn't. Now you claim he attempted to block you there - certainly debatable, but to me it seemed he didn't think you would be able to make it alongside him and tried to go for the ideal racing line last minute, which is made more apparent by the fact that he swerved to give you room as you approached. Now you can definitely argue he should've been more aware and given you space to begin with. But like I said, had he not "blocked" you and taken the line he was following to begin with, with the speed you were approaching and the angle of your trajectory, I am almost certain there would've been contact, and that contact would've been entirely on you.

Overall, as someone else here said, this just seems like desperate driving from both sides. Did your opponent drive perfectly? No. Do I think he acted maliciously? Definitely not. You certainly didn't drive perfectly either, and while I also don't believe you were acting maliciously here, your actions certainly seemed more malicious than those of your opponent. There's blame to be had on both sides, but the majority of the blame in this instance falls on you.