Everything sounds awful. It sounds tinny. I hear my typing and it is too loud. The list goes on.
That a normal reaction for a first time user. The past is distorted and the new hopefully was programmed close to correct. It is your brain complaining about the instant change to something it hasn’t heard in a long time.
It often takes two to six weeks to acclimate. When you type a reply, it won’t sound like the sky is falling.