Look for times when you gave away free damage. From the sound of it, you are still learning at a beginner to medium level. Record some of your own matches, and look for flaws in your play style that gave your opponent opportunities to punish you or attack you freely.
Wiffed moves you throw out to much.
Repeated pokes that opponents start punishing
Failure to tech repeated tick throw attempts
Jumping to much out of frustration
Jumping in after blocking a number of fireballs/long range pokes
Also look for times when your opponent mixed you up or got into your head, and look for repeated patterns in their playstyle that may not have been evident during your match. Along with that, look for times when you punish with throw when you could have done a large combo for more damage, and practice those combos so they feel like second nature.
Going over recordings of you matches should be great for you right now. It can really show you a lot about you play and respond to pressure, and where you can improve your game.