When I was doing injections I also found pins to be stiff, clumsy, and more painful. I use BD U-100 Insulin Syringes 31g 8mm 3/10cc 1/2 unit markings for corrections.They are small, very smooth operating , and easy to handle.
Part No. : 328440 UPC : 382908440011...Walgreen brand is #653532 about 2/3 the price of the BD brand.
Most of the time a injection is not going to hurt but on occasion you will find a nerve it just part of the game. You will adapt, survive, overcome, it's in our nature...;-)