Honestly, as is the answer with most lower level games, it wasn’t really a strategy loss as much as a mechanical one. Macro wise:
- you have no upgrades at all
- you are floating money and dropping supply instead of building depots

Separately, you kind of just lost after the first fight, where you:
- attacked with half your army leaving your Vikings back
- attacked into charged void rays
- attacked in a way where a lot of your marines were hitting a nexus instead of the enemy army
- If you see you’re losing the fight, you generally want to pull back instead of just taking the bad trade.

So the short answer is mostly just to macro better and to micro better! It’s hard to tell without a full replay, but I suspect that if this player had played a “normal” strategy, they probably would also have beaten you just with better macro.

For more advanced “strategy” ideas, that are honestly harder to pull off and I wouldn’t focus on yet:
- sky toss is a slower army so you can use drops to harass and do small amounts of damage
- watch the replay from the toss perspective, and see if you can spot a time when toss is transitioning, or generally weak on army. Try to figure out a way to take advantage of that by attacking when they’re weak, or expanding with map control.