Time Variant Assassin (Alternate MCU Story)

Escape

David rearmed himself with everything he had (gun, gun holster with human hand sewn on it, knife, knife holder, claw gloves, mask, leather jacket, and foot knife) and walked to the guy that was once sitting across from him. "Alright, I'm ready." David told him.
"You didn't shower, did you?" He asked.
"No, instead I took your Axe body spray, sprayed it into a pillow to waste it because it smelled like shit, and then took someone else's deodorant and cologne, Mr Paradox." David said. "I saw your ID. Now give me the time travel device so i can travel back to '42 and get what you need."
"You need to go back and find Captain America. We need him." Paradox told David. David was shocked at the name and had multiple questions. And he wanted answers. "You want me to go back in time to 1942 and presumably kill Captain America, an Avenger that A) helped save the world multiple times, and B) fought in World War II, correct?" David asked.
"Not kill him. Get him out of the war." Paradox told him as he pulled out a small device. David rolled his eyes. "Fine. But if any cataclysmic outcomes happen from this, just know I won't help save anyone."
"Nothing will happen. I-"
"I'll take care of your mission... eventually." David took the device and punched Paradox in his already broken nose. He opened a portal and stepped through.

David walked out of a portal in another universe at night. "San Francisco, 2018. Let's go see what this universe has." David said. He took a quick walk and went by a convenience store. He saw a black alien eat a man's head. "Nope. After that thing back home, I'm done with aliens." David said. He stepped through another portal. He arrived in a forest and was hit by a man in a brown and black suit. The man had a muttonchops beard cut. David held his claws up and saw the man was fighting The Hulk. "Oh shit. NOPE." David opened a new portal and dove through. He landed in an auditorium. Then he left the theater and saw a man suiting up in a red and blue suit. "Hey! You!" David yelled. The man turned around. It was a variant of Spider-Man. "Oh. My bad. Sorry." David said. Spider-Man swung away. David opened a new portal and did a back flip through it.

David landed in 1942 in his universe. "Okay, let's get this shit over with." He said to himself. He took a look around the field he was in. Nobody in sight. Then he heard footsteps. He span around to look and saw a guy behind him. He immediately jumped at him and grabbed his face, sinking his claws into it. He dropped the man and two other guys attacked him. David fought one back and slashed at his leg. The other managed to tase him and get him knocked out.