looking at your recent games you lost, you lost because you blundered. Your blunders usually weren't even in the beginning of the game, but came in the endgame. This isn't a reason to switch openings, since you need to work on tactics and endgames. If you work on openings you'll likely run into the same problems.
The goal of the opening is to get a playable position, which you do. There's no point in learning to play openings more accurately when you can't use whatever little edge you may get.
If you want a really simple system play the exchange french e4 e6 d4 d5 exd5 exd5 and then develop normally. Against the sicilian you shouldn't have trouble finding decent development since you usually are the one with a pawn in the center.
Also play slow games, since you'll actually have time to think about your moves. You won't fall into opening traps as easily if you're that worried about it.
Hi, I'm a lower rated user on chess.com. I usually open with 1.e4. Besides ...e5 I see c5 the sicilian and e6 the french a LOT. I have tried the smith-morra but it dosen't work well for me. And I do not know the best lines against the french. Maybe after1.e4 e6 2. d4 d5 should I play nd2 ? because I hate the winawer or whatever. please help