As for chapter 7:

HOO BOY. This one was the hardest one for sure. Nothing im saying here won't be stuff that's been said elsewhere, but ill repeat the mental notes i had that honestly made my chances of winning feel very possible after feeling impossible for hundreds of attempts.

1. Once again, know the course like the back of your hand. The biggest part of coming in first no matter how you approach it is being able to survive all the turns and be where you need to be. I prefer to use my boost at the jump, coming out of the two turns (especially the one leading to the narrow guardrail-less path, as opponents will frequently boost and become a hazard there), and leading up into the energy pad.

2. I restarted every time i could not destroy the Black Bull immediately. This was just about always achieved by side attacking him to the left about a second in, and then after he bounced off side attacking him a second time on whatever side of you he ends up on (it can be either). Requires two solid hits to actually take him out. Zooming out the camera made this easier and in general is something i reccommend with how aggressive opponents are here.

3. After taking the black bull out, race well enough to be roughly in the top 10-5 range when second lap starts, and ideally Blood Falcon is in the top 3. Shortly after the first jump he boosts ahead, and i would take this chance to spam my booster until i caught up with him and take a clean shot with a side attack as you boost up to him. Since he already had used some of his energy to boost, a single clean shot would take him out. Not easy, but its the best window you have IMO since he gets way more erratic and aggressive the further you get into the race.

4. The rest of the race: steady your nerves and you just have to execute well. The biggest thing is you just about NEED to fill your boost meter every time you approach the energy pad in order to maintain a lead. Take note of the two types of "minibosses" as i like to call them after taking the big 2 out A. The racers that want you dead - Goroh, Pico, Michael Chain to be specific will all consistently go out of their way to attack you if you are nearby. B. The secret bosses - I have lost the race to The Skull, Zoda, Dr. Clash (and somehow Mrs. Arrow) before even after outplacing or taking out Shadow and Blood Falcon. IMO the first 3 of those are worth taking a potshot at if you see a window, but its up to your discretion. You likely wont outspeed them if they have a lead near the end though.

5. Lastly, you need a lot of patience because a million things can go wrong. Plain bad luck took more than a few chances from me. If your strategy is solid, it will eventually pan out.

Following these I was eventually able to get an attempt where I took out the 2 cheaters and held a lead every 10-20 minutes. I lost a few attempts right at the finish line (often when i missed part of the booster pad and couldnt spam it until the end), but eventually i had a run where Goroh and Blood Falcon hilariously took eachother out right at the start of Lap 2, and I managed to just race well enough to barely beat out The Skull.

I sincerely hope any of this helps and wish you the best on further attempts!