Hi, I have been doing dressage for about half a year now. I've had a few different instructors. My first instructor was amazing, they did wonders for my riding. However, they left the country so I went with the other dressage instructor at the stable I was at. The pretty much undid everything I had learned but they convinced me that I was improving tons-which I wasn't. I lost my balance in my seat. I want an instructor that will pick on me for any mistake I do-seriously. They weren't very good at dressage themselves now that I look back. They were very heavy handed and actually quite mean to horses. I see why my horse wasn't willing or happy to work in dressage. My current instructor is pretty good. They are a little set in their ways and I don't like going 100% into a new training method. Right now I want to learn new things without having a set mindset of what is right and what is wrong. They have started helping me with my position but I wouldn't say they are very good at it

. I just feel frustrated right now. I've had a few lunge lessons with my horse which went pretty well. During my lessons(both on and off the lunge) I don't feel like I get a chance to understand and get anything with my horse. After some bad horse trainers, I am trying to understand my horse again-riding wise. My instructor tells me something to do with my horse, for example to get him to stretch forward into the bit and relax, and if I can't get it in like 10 seconds they go onto something else. I just get more and more confused. I need some time to get a result. I'm not a trained dressage rider, it also just makes me feel more and more like I suck! My instructor knows dressage well and I like their concepts too. I'm also not aloud to lunge my horse before my lessons. I don't lunge my horse to get the energy out of him but just to get a connection with him before I ride him. That was kind of a rant. Do you think this is a good instructor?
My riding problems:
-my horse is very narrow and I have long legs so I can't fully wrap my legs around him. What are some tips you may have? My dressage saddle has giant thigh blocks which impedes me from shortening my stirrups for his size. For wider horse, my saddle is built to fit my legs and body perfectly.
-I have troubles sitting the trot. My horse is pretty bouncy too. What are some tips? What parts of my body move with the horse and what don't?
-my horse used to be super light to my leg. After a spur happy trainer he is not. Right now I am riding without spurs. He is a forward horse. How should I get him lighter on my leg again?
I just feel lacking of instruction from my instructor... My horse isn't reacting poorly to this trainer-like he was to my other one but he isn't reacting super good.