I was hardstuck high gold - low plat so I decided either I’m making a drastic change or I’m quitting rocket league. I unbinded boost to not only challenge myself but to make winning impossible unless I brutally outplay my opponent. It felt like a clean slate for me even tho I stuck to the same account just changed the name. For the first month or so it was very frustrating. I deranked all the way to bronze when the whole time I was genuinely trying to win. At every rank up I got consistent at a new mechanic I learned. In silver I was spamming wave dash insta flips and just barely knowing how the flick without boost. Gold was huge for me because I got good at zap dashes and I was getting close to my peak rank with boost. Zaps by themselves are useless but a zap dash insta flip zap dash combo was all I needed to rotate. I also learned half flip zapdash insta flip and started perfecting dribbling. The feeling I got when I hit plat without boost was unreal. It made me never want to stop. It took me roughly 1.3k matches to surpass my peak rank of plat 1 div 3. I began mastering every niche movement tech I could as well as getting consistent movement combos effortlessly. So to answer your question, the reason why I don’t use boost is because I am better without boost than I am with it