Well there are several reasons for that and i also think that no one should invest into meme-coins because as long as people do it new meme-coins just keep on appearing each and everyday. A few reasons why most people dislike meme-coins are probably that they offer zero utility to it's users and investors, they are not even real projects as they are just creating another BSC or ETH token with a website template and that's it, 99,9% of all those meme-coins will be completely dead a few week after it's launch, people are just creating meme-coins to make some fast money with it as zero effort is needed to create a meme-coin. This are just a few reasons, there are plenty more.