Entering the life of poker with my first freeroll tournament

Hey everyone, I recently found out about this freeroll tournament and thought, "Heck, if they can win, so can I!" So I tried it and didn't expect myself to be eliminated so quickly.

The tournament ended in a flash—well at least for me—and I realized I've been folding too often when players kept shoving all-in. Constantly blamed myself on my bad hands even though I thought my cards were fine up till the river was out.

I'm sharing this hoping to learn how you would play, well at least in this situation. How do you deal with constant all-ins? Any tips or advice would be great.

Thanks for reading and am looking forward to hearing your thoughts.