Viruses exist there is no doubt about that. If they ceased to exist nature would absolutely collapse and n a matter of days.

https://www.bbc.com/future/article/20200617-what-if-all-viruses-disappeared#:~:text=The%20vast%20majority%20of%20viruses,plants%20to%20insects%20and%20humans.

They are totally different than bacteria and much much smaller, in fact bacteria are known to get killed by viruses all the time. If it weren't for virus regulating bacteria populations we'd be getting bacterial infections more often, so would the rest of nature.

Viruses are alot like the mRNA vaccine, just a bit of genetic material that hijacks a cell. Bacteria are a type of cell. They do not hijack cells.

Certain bacterial infections can be fought by taking viruses that are safe for humans but that will kill bacteria.

They are call bacteriophage.

https://en.m.wikipedia.org/wiki/Phage_therapy#:~:text=Phage%20therapy%20is%20the%20use,more%20frequent%20use%20of%20antibiotics.

Of course those medications are illegal in the US

Viruses also perform more positive seeming roles in nature. Certain infections are known to protect the host of give them an edge in some environmental niche.

Viruses might actually may be used to fight cancers and tumors.

https://www.medicalnewstoday.com/articles/276966

https://www.nature.com/articles/d41586-020-03226-z