I'm in the same boat (well, I was, prior to these repetitive lockdowns). I passed my theory test in 2018 and started the lessons then. Well, 3 years later, I still don't have my full license which is a huge frustration!
1. First instructor (School A) - Terrible, one lesson, he was rude and asked me to do more lessons before starting the EDT. Ridiculous.
2. Second instructor (School B) - Great lady, but she ended up leaving the school.
3. Third instructor (School B) - Great instructor, but he was really pushing to get me to book more lessons as he knew I was solely relying on them to get some driving experience. I was spending tons of money on those and they were getting rather expensive with no discount. The school was also quite pushy to get me to book lessons. One time, he mentioned about how some of his students gave him tips after they passed and said we should go for a drink after the lesson. I stopped the lessons right after that. It's inappropriate to expect me to give him an additional tip when I'm already paying a fortune on lessons (most expensive school in Dublin).
At that point, I already had one year experience (3/4 hours per week).
4. Fourth instructor (School C) - Father of a former colleague. Complete car crash. Took lessons with him for a year in addition to the above mentioned year. Failed the test twice in Raheny. Second time around, he increased the price of the test car rental on the spot right before my test because he saw I didn't have any change (price was 135, but I only had 150 and he said "Oh it's 150" - complete lie as he had only charged me 135 the last time and never mentioned any price increase). Then I went on to take the test and the tester took me for a one hour drive (not the usual process). Then when got back to the center, he said the car was not road worthy and he knew it as soon as he got into the car but didn't want to stop the test because I had paid (lol). Failed the test obviously and he asked whether I ever drove in a different country as I was confusing my right and left (complete joke, I only have experience in Ireland - obviously prejudiced as he saw I was born overseas). The instructor said his car was perfectly fine (bit of a lie as the car was indeed roaring the whole time). Needless to say, I never took lessons with him again.
At this point, I still have my provisional, but hoping to take automatic lessons once this lockdown is up and with a bit of luck, I'll be able to put this disaster behind me. If I'd known then, I would have gone for automatic instead of this manual hassle, but at least I have some experience now. Next test might not be in Raheny though. Pass rates are low and testers are quite rude.