There very well could be. Fanfiction writers often like to explore unusual crossovers. Since both Harry Potter and Thanos are extremely popular in their respective franchises, it's a ripe area for creative exploration. However, the quality and availability can vary greatly depending on the fanfiction platforms you search on.
A 'harry potter destroys thanos' fanfiction would be an epic clash of two very distinct fictional worlds. Harry, with his Gryffindor courage, would face Thanos fearlessly. He could use his Patronus charm to ward off Thanos' dark presence. His ability to apparate could give him an edge in dodging Thanos' attacks. The story could also involve the Ministry of Magic getting involved, perhaps trying to understand and deal with this new threat from a different universe. And the wands of the wizarding world would be a fascinating contrast to Thanos' gauntlet. It would be a story filled with action, adventure, and the exploration of how two such different worlds could interact in a battle scenario.
The Avengers have killed Thanos in certain comic runs. However, the comic universe is full of twists and turns, and his fate is not always straightforward. Different writers and storylines handle it differently.
Yes. Thanos' clashes with the Avengers in the comics led to the demise of some members. His might and strategic thinking gave him the upper hand in these battles.
In the comics, Thanos has managed to eliminate some Avengers on multiple occasions. His immense power and determination often pose a significant threat to the team.
Oh, for sure! Thanos squared off against the Avengers multiple times in the comics. Their clashes were intense and had a huge impact on the comic universe.