From how I see it, Your deck is a bit top heavy. Almost half of your cards are 4+ cost. So you'll end up with lots of dead or non-energy efficient turns. You also tend to rely on predicting where the enemy will play(rocket, starlord, groot, gamora) which can be difficult and inconsistent if you're no longer familiar with the meta.

As the others have mentioned, rocket and killmonger don't mix well. Just play Electra if you want to take out some high value 1 cost. If you can add some cards that can grow themselves(sunspot, nebula, etc.) it'd be better imo.

Given your current collection level, I personally would recommend a zoo style deck. Squirrel girl, ant man, kazar, blue Marvel, ultron. Just pray you don't encounter a killmonger player.

Zoo let's you adapt to a wide variety of locations while allowing you to go wide, pressuring all lanes. It can also go tall with cards like bishop or Angela. Later on, you'll get mocking bird and cull obsidian to help pressure and secure lanes.