Do I have to say SPOILER ALERT?
First of all, Peter Parker's death took the longest time. I think its because of his accelerated healing powers. Death took over him like it took over others and when it did, his healing powers tried to reverse it. But it didn't help. He only had to face his death for longer time.
Secondly, out of all the characters dying Peter was the only person to react and panic when he died. At first I thought that it was because he is a kid unlike the others and was scared. But giving it a second thought it came up in my mind that Peter was actually the only one among all the people who actually knew what was coming. All others had only realised that they were about to die when when they were almost half way through it. But Peter was aware about it a few moments before it started and that's because because of his spider senses. But at that moment he knew he could do nothing about it. No wonder he panicked like the teenager he is! .
Secondly, I don't think this death was too painful. At least not as much as the others like Gamora or Vision. The ones who died didn't seem to be in pain. But again, spider senses enable Peter to sense and feel things at least 10 time more intensely. He said he was feeling sick and stubled on Tony crying and saying "I don't wanna go." He surely was more affected than the others. He was in more pain than anyone else!
Woah, this was a load off. Yes, I need to write to feel better in any situation. I published it so that you all can share your thoughts too. Comment and give hearts so that you stay updated about the next chapter.
THE NEXT CHAPTER IS GOING TO BE TONY STARK.(THE LOVE OF MY LIFE!)