I face a lot of doubts about wuzu that my wuzu is broken. I am really frustrated with these doubts. What can I do to save myself from these doubts ?
If you have waswasa regarding passing of wind: You shouldn't presume based on sensation, but should only redo wudu when you have clearly heard it or smelt it:
Narrated `Abbad bin Tamim: My uncle asked Allah's Messenger (ﷺ) about a person who imagined to have passed wind during the prayer. Allah' Apostle replied: "He should not leave his prayers unless he hears sound or smells something."
Abu Huraira reported: The Messenger of Allah (ﷺ) said: If any one of you has pain in his abdomen, but is doubtful whether or not anything has issued from him, be should not leave the mosque unless he hears a sound or perceives a smell.
Regarding waswasa regarding something coming from the genitals, the prescribed method is to sprinkle water over them so that one knows they are intentionally moist:
It was narrated from Hakam bin Sufyan Ath-Thawri that: He saw the Messenger of Allah perform ablution then take a handful of water and sprinkle it over his private area [to remove any doubts about urine drippings.]