I see it too from your point of view, the sudden sack somehow felt so off and may possibly throw the team off balance awhile even though he was not doing so well with them, but if a new coach comes, it will be tough work for him amd I hope they are not expecting some magic too else they should be ready for some very messy season, it would have been easier with ten Hag to turn a new leave than it will be now starting all over with a new coach.
I know some will think that this decision will be a tough one for the team, which even as so, I think is the best for the team. Because if Erik ten Hag was able to do something better, then they would have seen a bit of change. Even though we all know that the management also sold most of their players, still, Erik was not capable of being a coach, considering his performance in Manchester United and also in Bayer Leverkusen. So, sacking him is the best decision. If they get a better coach, it will take some time for him to adapt to the team, but still, if he is capable, then they will be expected to show an astonishing performance before the end of the season.
Bro it makes no difference turning a new leave or not, trust me if they should get a well experience coach with some kind of good tactics trust me they will definitely do well in this year campaign, to me I think it's a wise decision that was taken by the management, like Erik Ten Hang really has nothing to offer rather than doom to the club like he did to Manchester United, the only way I can agree with you that maybe the new coach might not do well is because Erik Ten Hang had sold almost all the key players and that's not really good for the team, but a good coach can still manage this team and achieve something.