It's their A selection.
A few points why it looks like this:
A really bad coach, even in the past we experienced similar failures under this coach. I have experienced many matches where we were under much more pressure and the result was much more favorable. But we had to go into that match in a different mental state and not wait for the first few goals and then maybe start playing something. It is perhaps clear whose job it is to prepare the team. I personally hope that there will be another coach next season.
Poor performances by some individuals from whom more was expected. Badinka, Šalé, Felcman, Petr and some others have no business there at all.
If we make a mistake, the opponent will punish it, and we made a lot of really stupid mistakes. While we didn't use our chances.
Even the goalkeeper doesn't catch well, and that can never go well with such an opponent.