Why did Germany still have the strength to wake up and counterattack in March 1945 during World War II, but the situation completely changed in April?

It could be said that the situation was over at that time. The Germans’ slogan was: withstand the Soviets in the east and west, and let the Americans kick our ass on the western front. I hope that Lao Mei will advance quickly, and then Lao Mei and Mao Zi will fight to the death. The Western Front was empty, and all the troops came to the Eastern Front

And at that time, the 1st and 2nd Belarusian Fronts of Zhukov and Konev were in a state of rest and preparation, preparing for the final blow against Berlin. In this case, the battle lines were relatively calm. Mustache's armed forces seemed to be okay, and they used all their elite forces to attack Maozi's second-rate troops

In April, Mustache was out of fuel and his troops were exhausted. Maozi and Lao Mei attacked at the same time, naturally. The situation is over, the army has fallen like a mountain