sternone,
I agree with everyone else - change your instructor (and maybe your school) now!
I had an early instructor who sounds much like yours. He was always mixing me up with other people. Now, as an instructor myself, I know how difficult it can be to remember the stage everyone is at, if you have a lot of students. But in that case you take lots of student notes, get in early, and read them. Treating everyone as an individual and knowing what stage they're at is crucial!!!
You should get briefings. Missing them occasionally if things are running later can happen. But if you're really not getting them most of the time then you're being shortchanged, and you're not learning what you really need to know. There's far, far more to flying than just manipulating the controls.
You should not be landing in 15kt crosswinds unless you're at the stage of learning crosswind landings, and 15kts is a lot. I don't care whether you mind or not; you shouldn't be doing it.
Running down other flying schools is unprofessional unless they're really dangerous or something similar.
As Gemma said, you should be doing your own pre-flight inspections; this is an extremely important part of flying training.
I don't normally criticise my fellow instructors; it's a hard job and none of us are perfect. But if what you're saying is true, this chap is not good for you...or for anyone. Get someone else. Your early training is the most important part of your flying. Habits made now will stay with you forever. Things missed out could be dangerous later on. And you don't know what and how much you don't know, and what's being missed out.
I had a crap instructor early on - an hourbuilder who couldn't wait to get an airline job, and who thought because his pay was poor then he could do the job badly too. I stayed with him because I was loathe to change; you kind of get locked into being with one person, and think it'll be OK, and you don't mind, and all that kind of thing. It had repercussions that affected me for years, and probably still do. I wish I'd walked out on him the first time the very slightest doubt occurred - but I didn't know then what I know now, I had no-one to turn to for advice...and I didn't have PPRuNe. You do! You owe it to yourself.