Post a video. Spins "feel" easy because all you have to do is hold on! Also some people find timing with spins challenging other have an easy time with it. Pole sits and climbs have more to them then just timing.
Is your pole warm?
Is your body warm?
Are you sweaty?
Are you sliding or just finding it too painful?
Are you tipping the hips a LOT if you have very thin legs?
Are you crossing at the ankle instead of thigh over thigh if you have larger legs? For sits.
Are you're pole holds strong?
Pole is also a mental challenge, so if you approach a move assuming you will not be able to do it, you will always struggle. Strength and conditioning before working on Climbs can be super helpful.