I am kinda new to the game and can't quite wrap my head around the problem with my design and each time it goes above 23k / 1.4km/s it spins out of control or just doesn't have any oxidizer left (most of the time both)
the whole design probably sucks but I searched every tutorial and still don't get how it's supposed to work
https://photos.app.goo.gl/dxUdJqeXaoKad68T8
https://photos.app.goo.gl/tacHjuSu8FmGFG4r7
https://photos.app.goo.gl/UApwsuvQEbbhvUuk9