Starting new subjects at A-level is not that hard, plenty of people start at least 1 subject they have not done already at GCSE. 2 may be more of a challenge, but it should not be that hard for you to cope with if you put in the work, and something like media involves a lot of practical work anyway that allows you to pick up skills pretty fast. If you don't want to do applied ICT then you should not do it - at the end of the day if you do not end up enjoying your studies you are not going to get a lot out of 6th form. Likewise, if most of your friends are leaving then you may find that what was once in your 'comfort zone' feels rather less friendly.
Additionally, I should point out that for an English with creative writing degree, the subjects at the new school seem like stronger choices than those at your current school, and thus I would say that all in all the new school seems like the better option. It may be more difficult to make the change, but (and I know this sounds cliched) often times the harder choice ends up being the better choice for you.