First 3-4 seasons were great but as main characters started leaving the show and new additions weren't able to fill their gap, the show quickly turned from Gallagher story to Macguire story where Gallaghers became side characters in a show where they started out as main characters.
Also, the first 3-4 seasons were really funny but the show turns into a drama show after 5th season and jokes became rarer and rarer while sad/tearful moments take bigger and bigger chunk of each episode. The first several seasons were a good mix between comedy and drama but later seasons completely lost the comedic aspect and characters became increasingly dry and boring.
This is what happens to a show where all main characters leave the show one after another and they get replaced by dry boring characters that fail to replace them.
Also, the first 3-4 seasons were really funny but the show turns into a drama show after 5th season and jokes became rarer and rarer while sad/tearful moments take bigger and bigger chunk of each episode. The first several seasons were a good mix between comedy and drama but later seasons completely lost the comedic aspect and characters became increasingly dry and boring.
This is what happens to a show where all main characters leave the show one after another and they get replaced by dry boring characters that fail to replace them.