A quarter of second-tier clubs have axed their managers this season, with Walter Zenga and Gary Caldwell becoming the latest people to lose their jobs.
Former Italy goalkeeper Zenga was in charge of Wolverhampton Wanderers just 87 days while Wigan Athletic also dismissed Caldwell last week.
Zenga and Caldwell joined Roberto Di Matteo (Aston Villa), Paul Trollope (Cardiff), Nigel Pearson (Derby) and Alan Stubbs (Rotherham) on the list of managerial casualties.
Carvalhal, the sixth-longest serving manager in the division despite only being appointed in June 2015, told The Star: “I don’t like it when I see a colleague out of work.
“Football is changing very fast but it (managers losing their jobs) is not good for the game. We are part of the process but there are a lot of people involved.
“It is more easy to sack a coach than for three or four people in a club to accept responsibility. When things aren’t going well, the easiest thing to do is change the coach.
“Even though I don’t agree with it, it is modern football.”
There were 18 dismissals in the Championship last time around. Nine teams appointed new managers before the start of this season, with five having already been given the boot.
Carvalhal is worried by the lack of time given to bosses at this level.
“If you understand football like me and most of the coaches, it is difficult to understand how you can change a coach and expect after one or two weeks to play fantastic football,” said Carvalhal.
“It is very strange to me and I don’t understand football like this.
“When a new coach comes in, they must develop a new philosophy and may play in a different way and you can’t achieve these things in one or two weeks.
“It takes a long, long time to create the way you want to play and for your team to understand the connections between the defence and attack. They have to understand what you want them to do when you win and lose the ball and these kind of things take months and months of work.”