Let me give a little more information/perspective, as the OP may not be a regular AA flyer.

AA regularly posts schedules that are basically "placeholders" - as in "Maybe we'll fly it, and maybe we won't." Typically about 45 days before the beginning of the month, they finalize the schedules. So the March schedules are not really final until about mid-January.

(I've actually filed a complaint with the Federal Trade Commission that this is an unfair trade practice, amounting to "bait and switch." However I also contacted a very high-profile consumer advocate who said this wasn't a ripe topic for a class action, which is his specialty.)

In theory you can get a refund if the schedule changes by more than four hours. Of course, what most people want is not a refund, but just to get from Point A to Point B as close to when they expected as possible. In general, if you call AA with a reasonable revised itinerary, they will rebook you. Of course the two main rules of dealing with a changed itinerary are:
1) Wait until reasonably close to the flight date, because you only want to rebook to flights that will actually operate.
2) Find flights you want. Don't call AA and ask "What can you put me on?"

As regards hold times, things are tough all over. I had two encounters with Delta last year; in one case I could not reach a person no matter how long I was willing to wait or what medium (phone or chat) I used; in the other a friend (an extremely inexperienced traveler) had to rebook due to a delay that would make her miss the last connection of the day, and a gate agent flat-out refused to help her but said to "Use the black phone." Me being nowhere near, I have no idea where the "black phone" was.

So I would say, if you can get a 4-hour callback, it could be worse.

There is a silver lining, which is that with fares leaping up and down, I've been able to cancel/rebook a number of tickets to catch a fare reduction.

Nothing is normal about the COVID era, and air travel is getting about the worst of it, next to health care.