I remember a few years ago I could only do something like 12 push ups at once, and max out at 20 pushups total. Upon seeing how pathetic I was I started to train myself and after one month I could do 100 pushups (5 sets, 20 reps each set with like 90 secs rest in between). I thought I could build pull ups like this but I was so wrong. There is a pull up assist machine in the gym that I started going to about 2 months ago (I go there 2-3 days a week). I first started with 55 lbs assist, then 40 lbs, then 25lb, each time I would do at least 4 sets with 6-10 reps each set. At 25 lbs I started adding a static hold on the top (for 3-5 seconds), I am now at 10 lbs and starts to struggle a bit (I can only do like 6-7 reps the first set, then 4-5 the second set, 3-4 the third set and so on), however I am still nowhere near a perfect 2 rep no assist pull up. Speaking of frustration, Is there anything wrong with my method of training or my body?
I also have a pull bar at home, I just want to hang on it and do two reps of perfect pull ups whenever I want. It's just not happening.