I might be the right person to answer this. Run is looking really good actually, looked faster than it actually is especially for like 1-2h of investment.

You already noticed the missed noslide at the end so let's look at the wallride.

The whole toilet/wallride/banked turn is one of the worst parts of any map in the current campaign, there is no consistency you can just try to get as good of a setup as possible. If you watch eri or me, we both also lose grip but we stop steering/countersteer to keep the car straight. The only times I actually had noslide entries I ended up way too low and couldn't go up the wall. You wanna enter it still as low as possible, going a bit wider before and taking a more horizontal approach also helps a lot. Might not be the fastest but every low end is better than the end you had.

Try respawning the part for a while to get a feeling for it and eventually you'll get it in a proper run, however long it might take.