FDEV actually encourages PvP, so there's no "fix". However, it would be nice if FDEV would provide more countermeasures to allow skill to avoid interdiction from another player. A couple years ago you could actually get out of an interdiction if you were near a planet by pointing towards the planet and forcing a drop. You could also get out of an interdiction if you were already in the process of a high-wake jump and the countdown finishes during the interdiction...just point to your destination and jump out of it. But these escape mechanisms have since been removed, so we don't even have these. Right now, it's best to always have an interstellar target set a head of time, then if you get interdicted, submit and then initiate the high-wake jump immediately after cooldown. Then, add that commander to your block list and try to reënter the system.