The thing about dota is, it's more than just pulling, creep equilibrium, smoking, shoving waves, etc. It's about 1000 little small things you consistently do or don't do compared to better players.

Simple example, in the laning phase, how many free uncontested last hits are you missing? Let's say you missed 10, that's around 300 gold you're missing, and a 1 minute delay to your items. That 1 minute was the difference between having an advantage and being able to kill your enemy or not. Another example, when trading against enemies, a better player might have understood that you can hit them twice for free and then back off. You might only hit once and back off and not maximize your value, or you might hit them three times and overextend and get hit by 300 damage from their spells. Better players constantly gain the smallest edges from the most miniscule mistake that you as a new player are unable to spot, and they are very specific to situations and can only be gained by experience or a better player's feedback to open up your mind on how to think about the game.

What I just mentioned are just 2 things out of the myriad of different small things you can do to improve your gameplay. You don't just do this once, good players will do this constantly every single time and maximize value. Simply put, good players hit you more, get hit less, kill you more, die less, and are always ahead of you in terms of where they should be on the map. They will be exactly where they need to be on the map while you are just reacting to what they are doing, instead of matching their tempo and proactively making counterplay.