The average skill in PvP has risen quite a bit over the years. If you arent playing much if at all, like you stated, then you will be in the bottom percent of players. PvP skill in other games does not directly translate to D2 PvP. There are builds, movement, and weapon combos that make a big difference. As does map knowledge and reading the enemy. Of course, there are cheaters and device users, but its not as popular as some people may want to believe. The reality of the situation is that the P2P connection with low player counts spread the players across wider skill and latency ranges than it did before. What we have now is outlier protection in matchmaking, where before there were enough players to have decent SBMM or CBMM. Now we can have neither good SB or CB matchmaking. Some games, you are a god in connection, others, you feel like you are a second behind everyone else. If you arent playing PvP, you dont get used to the feel of the connection and how it differs game to game, and how it differs from PvE which most of the time feels like you are playing in real time. If you want to improve, and get more wins. Play with your team, dont try to fly solo or be a hero. Those will get you killed more than help the team get the win.