DSA is and regulation of the whole internet in EU – it adresses illegal content, transparent adversing and disinformation. Every nation needs to choose institution that will regulate by law what is legal and what is not.
Problem is – this could be easily abused to censor some content. In my country (Poland) there was even talk of blocking X (Twitter).
This could be used to manipulate elections. Some people could easily report some websites or social media posts as „illegal” and then they would be taken down.
From 2 to 21 days the reports would be checked by the institution – and then if the posts/websites are considered as legal – they would come back.
This could become big censoring problem like „ACTA 2.0” from 6 years ago.