What prevents Kpop from being mainstream in America (compared to country music, Latin music,...)?

you're asking why americans prefer... country music?

the language and the culture and there are many reasons

Quote from OnceMidzy4ever

They can do Nothing. Koreans cant match Latinos. Les falta mucho para igualar nuestra sabrosura.

Como dice Bad Bunny: "Todos quieren ser latinos, pero les falta sazón, batería y reggaetón".

Quote from icyruios

I thought it's obvious. Asians

what asians? damn asians preventing kpop from reaching mainstream america!!!

wait till I get my cane on those pesky asians

The fact that Hispanic is one of biggest etnichity in the States makes sense why Latino is always more popular in there. But in my opinion, it's actually Latin music actually do outbanger any song from KPop recently. One of the biggest Latin song nowadays is Un1000x from Grupo Frontera ft. Bad Bunny and it's very catered towards American than let's say Queencard (or Cupid)

Could be the language barrier

K pop seems to appeal to a certain type of listener, not everyone who listens to it is going to become addicted to it.