If you don't like people eating snacks at the cinema, then don't go. As long as the cinema sells food, they are perfectly entitled to munch and chomp their way through the entire movie.
If you were paying attention to the movie, you would not notice some random stranger checking their phone for what might be an important impromptu text from work. They can't be blamed for your gnat-like attention span.
If you don't like people wandering in late, why not ask the cinema to ensure that there are working ticket machines and more staff available to serve customers so that they do get in to see the movie on time? Also, a chat with the bus companies asking them to run an accurate schedule would most likely help as well.
If you don't like people needing to got to the toilet during movies, I suggest that you get doctors to reinforce bladders from birth to ensure that there are no variables in how long people can go without a wee. Also, a strict "no liquids for 3 hours pre-movie" might do the trick - hope you can be in several homes/places at once to make sure the proles adhere to this.
If you don't like people chatting through a movie, have the cinema enforce a strict code of silence and have the staff around in the theatre to enforce it. Than again, please do not complain when the price of your movie ticket goes up to pay for those staff.
Yes, 'tis annoying when these things happen - they can ruin your experience of what should be a nice relaxing night/day out. However, unless there is a way to get all of the above variables (and then some) sorted, there is little you can do other than what other people do - wait till the movie comes out on DVD and watch it in the privacy of your own home.