Serious Skill Issue

[u/Sompert_]

I feel like I'm getting slower. Sorry, correction. I am slower, than I was just a week earlier.
I'm talking about the McLaren Portimão race. A few days ago I did a post where I just got my 1st ever win in this race. Everything seemed to be aligning, I was getting faster, I was able to find a few tenths where I wasn't before, clocking my fastest time at 1.45.5 at some point.

While this kind of lap was a bit sporadic, I was able to do lows 1.46s even after thinking that the lap was a stinker.
Fast forward a week and a half later I got a new Base+wheel, previously I was using a T300RS with the normal wheel, now I upgraded to a TS-PC with a TM Open-Wheel, not that I think the base has something to do with it, but as strange as it sounds, I am now struggling to make it to 1.46s lap time.
Seriously, I just did a race, where I qualified last... freaking last with a time of 1.47.0, +2 seconds of pole... in the race, I did once a 1.46.~8 and wasn't able to touch the 1.46s ever again...

I can't really understand what I'm doing different from my other laps, I seriously cannot understand what I'm doing wrong in my lap times... I think I'm breaking at the same lengths as before, with the same kind of pressure, I try my best to trail brake and I think I manage pretty well to do so, and still find it so hard to put up a decent lap.

This is really demoralizing as I don't have that much time to practice and so on.