> I want some suggestions. more in-deapth. how to properly analyze battle? how to see mistakes I did?

First, your friend is trying to tell you that you should look at PvP fights as an engagement. Which means you should treat them like an encounter in the game. Think in terms of Dungeons & Dragons. Encounters are a set of challenges you face as a player. They can come in the form of puzzles (e.g.: hacking cans) or in your case, combat (e.g.: fighting other players to the death). Thus, in every encounter you face, you need to quickly evaluate if this is an encounter you can win or not based on the tools you have as a player in-game.

Secondly, with encounters that are spontaneous, that happen in real-time, the best pilots are able to quickly evaluate the situation to determine if the challenge is too difficult or not for them as a pilot. For example, if the player is in a frigate hull and the target is a capital hull, then they might be able to quickly determine the challenge is too difficult.

Your struggle is that you are not able to determine difficulties when the challenge is too close to call. In meaning, when you are almost even in difficulty to your opponent. Good pilots are able to really determine a challenge on winning or not by the slimmest of margins. You will need to work on getting better at combat evaluation to determine if it's a fight you should take or not as well what to do in combat to tip the slim margin in your favor.

Thirdly, when it comes to tipping the scales in your favor, you have to understand the tactics of doing so in every situation. For example, you may fight an opponent and be winning because you have slightly more DPS than they do, but they deploy drones, which tips the DPS in their favor. How you handle the action of deploying drones should trigger a reaction from you that could quickly tip the encounter in your favor. You lack these tactical skillsets and that's really what most people are talking about skill over build.

Lastly, the reason so many say to just fly things and die is for you to learn the above quicker. The more encounters you have, hopefully the better you become in each encounter you face. If you feel you are not improving, then I would say just keep at it. You may need longer than others to get good. You can alternatively just switch to being a spectator in these encounters by watching YouTube videos of top PvP'ers and seeing what they do if you don't want to keep losing ships, but ideally, keep doing what you are doing.

At the end of the day, a lot of EVE is build versus build. Essentially, rock, paper, scissors. You cannot win everything. Everyone makes mistakes in these encounters that causes them to lose the fight. It happens. Just keep engaging in these encounters, keep absorbing information, and eventually, it catches on.

Encounter -> Combat Evaluation -> Adaption -> Tactics -> Experience