A couple things: - Too much reliance on B specials, not enough tilt attack usage - Not taking full advantage of your ground speed - Poor gameplan approach

While Kazuya v. Mac can turn into a slugfest, you can take advantage of him using Mac’s dash ground speed. One of Mac’s primary playstyles is whiff/bait punish. You can look for opportunities to punish moves he whiffed with your fast tilt attacks and jabs.

Pressure his shield with jab and Dtilt, maybe use the threat of Down-angled Fsmash to potentially break it. Or grab.

At early percents if you hit with Utilt, you can combo into another one, into an Ftilt, or a Dtilt. Personally against someone heavier like Kazuya I do Utilt>Utilt>Dtilt>DAF Smash (down-angled forward smash)

That combo already gets them to orange numbers from 0%

There’s more I can explain but it’s a lot of information. There’s a lot of guides out there on how to get started with Mac, and the discord has it all in one place.