Sh Sharif is right. He's not 'speaking against' federalism. He's merely pointing out what it was supposed to be and what it has become.
Majeerteen insisted on adopting federalism because they were a de facto nation state and they didn't want to forfeit their independence to 'HAG'. They have opposed every central administration and will continue to do so because it's in their interest to have their own independent nation state.
Now, every clan and subclan wants to be independent like them.
This is where the problem lies - and what Sheekh Shariif is talking about.