You have to do what feels right for your family, but the first two days of school are often not indicative of what the rest of the school year will be like. It’s also a good idea to volunteer in the classroom, just so you can see for yourself how things work.
Some teachers like a more “chaotic” environment, and some students truly thrive in such an environment. Some teachers want everything to be in perfect order, and have a process for pretty much everything that happens; some students do best in this type of environment, too. Most teachers are probably somewhere in between.
If you have a preference for a particular style of teaching (and make sure it’s what’s best for your child(ren), as opposed to what you grew up with or prefer), you can talk the principal to see if he/she would be willing to let your child change teachers. It’s not often that they’ll allow this, but it’s always worth a try.
FWIW, yes, I think you should politely express your feelings to the teacher and principal. They might be able to better explain things to you (there might have been perfectly valid reasons for the noise or the teacher’s inability to call on your child at that particular moment), or change things in the classroom if there are weaknesses there that they hadn’t known about.
