It's not just Kpop, music in general is losing those feelings. I listen to a whole lot of genres. I understand that Mumble rap has a basic beat and sometimes, the lyrics are repetitive yet they give off a large emotional impacts in their song, especially people like Joji and xxxtentacion. Reggae is chill and normally gives you the feelings of happiness. When I say people who make repetitive music, I meant people who make a song literally over and over again but change it up so it seems different. So 5 songs could basically be the same thing but with different styles. There's also songs where the singers are literaly saying how rich they are and stuff.
The checklist I made isn't the full list cuz im a lazy fuck and I'm not bothered going further than the few main points but it shows music is dying. Excluding mumble rap, Rap in general is just getting worse. Instead of saying words, they'll say things like SKRAAA or ESKETIT or idk, sometimes they'll make up words and just scream to make themselves look cool and the worse part is people follow that shit. Music is dying and so are music tastes. In every genre, there's always great and amazing songs but sometimes they're not as appreciated as shitty average songs currently making top hits. Not saying all songs that make top hits are overrated because ofc there are good songs that are actually appreciated.
Also, don't think that Kpop is the least influential since you're from france, unless you're a fake flagger that is.