^ I feel like I can offer inputs on how to get over the hurdle of winning really good players, top 100 level players included, and you said it yourself: You didn't feel like winning. I feel like you're trying to rationalize it by saying you didn't have "control" during your set vs. KPAN in terms of outplaying him, but I moreso think your issue is a mentality thing. To me though, I think both goes hand in hand with control. Everyone is different on what works for them in terms of mentality. For instance, I have heard Armada tell himself that he could lose to a non-Top 6 member before tournaments, yet he has yet to drop a set. For me, that doesn't work at all when I tried to adopt that mentality, and in fact that made my general tournament performance worse. I have adjusted and thought about my best win conditions outside the game, and in due time I found out that if I just focused on winning, regardless of who is playing, it brings out my peak performance.
I would guess that for you, if you don't have the will to win, you create yourself so much more needless obstacles that makes it so much harder to secure a win and as you said, control. You don't have focus, and you might think of outside factors like wow, this might be my break to fight a top 100 player, and you get needlessly nervous. Or perhaps you get tilted the moment you lose a stock, clouding your head. Irrelevant thoughts will make it harder for you to secure wins because you're not focused on the match at hand. I can't tell you exactly what might get you into the zone, but for me personally it's just asserting my will to win. Perhaps you can try that, and adjust around what works and what doesn't.
I can anecdotally tell you that during my run where I beat Squid and Faceroll, I didn't care that I was fighting top 100 level players. Despite the fact that I've never beaten either of them and had like an 0-10 record to each of them, I simply wanted to bring out what I've learned about the matchups over the months. Having a clear head in what works in each matchup and asserting my will to win, I honestly forgot who I was fighting during my games. I forgot I was fighting Faceroll, the man who has oppressed every SoCal Marth in history with his brutal punish game which even PPU can't handle. During the moment, he was just some random red Sheik who was under my oppression in the corner and juggle sequences. I understood what I did wrong in between neutral interactions, and I made sure to adjust accordingly. What matters most to me as a competitor is to focus and maintain a clear head. And this goes without saying, I trained daily for this. Thinking about my killer instinct, asserting my will to win, self-compassion, etc. Every day, I meditated, and every other day I exercised and used my body in effort to adjust my mentality. Again, this process took months for me and I'm still training, and I doubt you will just magically have a better mentality immediately after reading my post and PP's advice (or anyone else for that matter), but perhaps in the coming months you might be ready for Shine!
Edit: It seems that I may have misread your post, and moreso you're asking that perhaps you don't understand why you got a lead in the first place. In that case, all I can offer is seriously focusing why you did x led to y in the first place. If you don't know why such interaction occurred, then you're effectively wasting your time and stunting your growth, but PP can probably give you a better answer. Still, I think what I said about mentality hurdles for players better than you is worthwhile.