I'm having a very tough time lowering my gaze and I can't stop fantasizing about female companionship. Is there any dua I can make? What other actions can I take?

You can recite ziyarat ashura for 40 consecutive days and ask Allah each day to help you get married.

Is it haram to refuse COVID vaccine even if whole family states that you must get it m?

It is permissible to refuse vaccine if one chooses

Are collecting pokemon cards haram? No gambling, just trading and collecting? I’m asking because they’re still cards you know? Also would it be haram to sell Pokémon cards?

No this is not haram

1) Why was Imam Ali a.s. Silent when Fatima s.a. was being attacked?

2) Why didn't he took fadak back during his time of caliphate?

If possible please give refrences as well

1) He broke Omars nose after they stormed the house and said he would have killed him if he didnt take an oath from the prophet not to fight against them. I suggest you to read this book

https://www.al-islam.org/tragedy-al-zahra-doubts-and-responses-jafar-murtadha-al-amili

It will clear many misconceptions for you inshallah. Also read kitab sulaym hadith 4 Here is a small excerpt from the lengthy narration ““Hadhrat Ali (AS) rushed, held him by the neck and pushed him away and Umar fell down and hurt his neck and nose. Hadhrat Ali (AS) intended to kill him. He remembered what the Holy Prophet (SAW) had said, and he said: “By Him, who gave Muhammad the status of Prophethood, O son of Sahak, if the Book from Allah had not been revealed and if the Holy Prophet (SAW) had not taken a promise from me before, then you would have known that you could have never entered my house.”

2) His short time in power was plagued by civil war after civil war. He was not able to do a lot of things because certain people would not stop trying to topple him.

I want to ask, is Illuminati the same as dajjal

No this is not same as dajjal and Allah knows best

If my hairs are to be considered long, how can I make sure the water reaches my scalp?

Part your hair to make sure water reaches. One finger is sufficient to wipe.

Can you please define the akherat of disbelievers?

https://youtu.be/Mubz90H1dZw

What are some known rewards of reciting ziyarat Ashura regularly?

It builds a connection between you and your Imam. Also it repels calamities

I want to ask the benefits of Dua Imam e Zamana (Allah humma qun le waliyekal

90 benefits

https://imammahdiac.org/resources/duas/newduas/faraj/