The beat the song is built on is one bar, played through bars 19-20, 23-24 and 27-30, and 11 more places -- 30.2% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 59 out of 100 -- a step up -- and the thing that decides that is how many notes a second it asks for.
The whole song is 82 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 120 BPM -- and adds the notes back over 4 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 120, 142, 163 and 185 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on hi-hat, snare and kick, in 4/4 at 185 BPM, counted in sixteenth notes. It is written out above, and it covers 30.2% of the bars the kit plays.
Bars 19-20, 23-24, 27-30 and 33-38, and 10 more places. The time is kept on the hi-hat to start with, and it changes 45 times over the song.
59 out of 100 on its own -- a step up. The song as a whole is 82 out of 100. Hard, and what makes it hard is how many notes a second it asks for.