yes thats currently the kinzhal's weakness, intercept it during early-mid launch but the issue is a patriot isnt a long range interceptor

thats why the math doesnt compute. kinzhal boosts "up to" mach 10 only when close to the target. at its top speed of 205km/s (assuming it went into the hypersonic mode) a patriot battery with pac2 missile (160km range) has only seconds to live adjust its trajectory to intercept the kinzhal. also kinzhal is an endo atmospheric type missile which are more unpredictable compared to usual ballistic missile paths

not saying impossible but assuming average 30% interception chance, and UA firing at least 4-6 missiles per kinzhal to increase chances and it can hit. but the main issue is can UA with their limited equip detect kinzhal fast enough for patriot to react? US has multiple early warning systems that does that, UA dont
thats why claims of "up to" but the thing is its still a darn beech to intercept given what UA has even if it goes beyond mach4. US has high success with patriot as they have a multitude of other systems to boost to patriot's accuracy in tracking

not atomise, but be in so many pieces its literally unidentifiable

the kinzhal from 2022 is reported to crash with the MIG-31K, so i dont think its launched even nor is it in hypersonic speeds