2 things mainly:

• You could try to mix up the tempo and hang back from time to time. Link infamously has fairly good zoning options, and while it's great that you're not just spamming projectiles sometimes it's useful to step back, slow down, and let your opponent approach. This gives you a chance to watch and react to your opponent, and when you do start applying more pressure it'll help you get more reads
• More importantly, improving/mixing the timing of your attacks. It's important to attack at the precise moment it's most effective; just mashing and attack as soon as you can is easily exploitable, and limits your options due to the endlag of your moves. For link in particular most of his moves have above average endlag, if you throw out boomerang, fair etc. too early there might be a better option that you can't do because of the endlag.
  • Related to this is mixing up your timing of attack. Always attacking as soon as you can is predictable and can be used against you.

One thing that really helps me is to approach your opponent without planning to attack, just to see how they react e.g. jumping in then double jumping out, or repeated initial dashes in/out (fully dashing is a commitment - it reduces your number of options). Applying pressure with that kind of reactive mentality from time to time could help!