• They have extremely low liquidity
• They are constant victims of pump & dump
• They are created by non-programmers who have never read the Satoshi whitepaper
• They contain basic programming errors in emission rate, proof-of-work, or block verification
• They are instamined by a small cabal of assholes
• They are bad clones of other coins
• They don't actually improve upon any state of the art

Anyone who treats shitcoins as anything other than a playtoy is going to find out the hard way why Bitcoin is in the lead.