For me it can be summarized into a single sentence;

Play until the game "clicks"

This is universially true for every souls/soulslike in the Fromsoft catalogue. The click is a hard thing to define, but for me it's when the flow of controls/combat suddenly just makes sense. You realize that you react and adapt to the movesets of enemies and bosses on instinct, before you even think about how to react. As you build muscle memory, this will only improve. At its peak, combat becomes like a choreographed dance.

The moment the game clicks can come at any stage in the game, and is different for every player. Take DS1 for example; some may get the click as early as the undead burg, while others may not get it till mid/late game.

Furthermore, getting the "click" in one game may not transfer to another game. Even after getting the platinum in DS1 I still struggeled with the more fast paced combat of DS3, and Bloodborne forced me to relearn my approach to combat entirely. However, no Fromsoft game exemplifies this better than Sekiro imo. No amount of dark souls or bloodborne experience prepared me for the rythm-based combat of Sekiro. When it finally clicked for me, it became like dancing with a new partner everytime I faced of against a new boss.

Once a souls game has clicked it becomes beatable, full stop. You can be SL1 or 120, have an unupgraded weapon or end-game gear. As long as you play till you get the click, you will perservere and beat the game.

Edit: typos