This might just be down to personal taste so could be nonsense but for me, I felt after Holy Fire, Foals were one more absolutely solid album (with 2-3 big singles) away from being able to step up.
I felt What Went Down completely missed (apart from Mountain at My Gates and perhaps the title track at a push), but I think they really fell off overall.
Their double album in 2019 was an awful idea from the beginning.
Still a great live band, one I've seen multiple times, and they always seem to get their setlist right to this day. Just think they slightly misfired when they had their chance to take it to the next level.
Overall, I'm a big fan, I saw them for £4 in a room that was 90% empty when I'd only heard Hummer, and seen them plenty since!