Well, not every game is for everyone, and that is OK.
Critically, the Chempill only prevents health loss due to movement in the Chemzone. Trooper still loses [H] in the Radwastes (until the Radsuit is obtained) and the Outlands, and for any Encounters in any terrsin type. So returning to Base is still advisable when [H] is low, or to clear hexes if they have been marked, and mission objectives in those zones not yet reached.
Trooper cannot just patrol in circles, as the hexes will be marked on the first lap and he won't have any Encounters when overlapping them, so can't get the objectives unless he finds the first time. He needs to return to base to erase those hexes. Hope that makes sense!
VPs are totally intended as a score, and rather than just being random, are about pushing luck against risk of death, and hopefully beating your personal best provides some entertainment.
Hope those notes help to clarify the rules a little and help you get more enjoyment from the game.