Supply shortages..
Meltdown, Spectre, SpectreRSB, RIDL, Fallout, Zombieload, Plundervolt, Zombieload 2, TPM-FAIL, NetCAT, SWAPGS, SPOILER, Foreshadow, Machine Check DoS, BMC flaws, Lazy FPU context switching issues, etc.
High price.
Core counts and performance starting to lag.
Why would anyone buy Intel?
(other than the CEO has heard of them so won't question it)