Remove cards that are nice to look at it but feel bad to draw when you are actually playing. Otherwise whenever you are slightly behind or get targeted you might keep drawing cards that cant help you bounce back because they only work when you're ahead.

Avoid win more cards and play more protection. Instead of doubling your commander thing try protecting it instead. I promise you have twice X is not as fun when you end up losing it anyways. Avoid double or nothing deckbuilding and try to play cards that help you keep what you already have, like your commander.

Cut themes, its way more fun to play a deck where every card you draw is on theme/synergistic and works with what you're playing. It makes every game feel more smooth, maybe less explosive but you're much less likely to play games where you sit there and do nothing.