NOT ALWAYS vandalism: Even if misguided, willfully against consensus, or disruptive, any good faith effort to improve the encyclopedia is not vandalism. (also, WP:AGF)
NOT IMMEDIATELY disruptive editing: Disruptive editing is a pattern of editing that disrupts progress toward improving an article.
Editor 1 makes an edit, I revert it, Editor 2 re-adds it
WP:BRDR: "If you revert twice, then you are no longer following the BRD cycle: If your reversion is reverted, then there may be a good reason for it. Go to the talk page to learn why you were reverted."
Conclusion: If I revert a bold edit, and it is restored by another user, the new edit stands until discussion is held (unless it violates policy)
Editor 1 makes an edit, I edit their edit, Editor 2 reverts me
WP:REVERT: A revert is "undoing or otherwise negating the effects of one or more edits"
Bold edits may still be considered "reverts", but not always
WP:SQSAVOID: "If the status quo cannot be defended with strong arguments based in policy, guidelines, consensus and actual practice, don't try to defend it."
WP:STATUSQUO: "The procedural practice of temporarily favoring the status quo prevents edit warring while discussion is taking place"
24-hr BRD enforcement banner: "If a change you make to this article is reverted, you may not reinstate that change unless you discuss the issue on the talk page and wait 24 hours"
WP:BRD-NOT: "BRD is not an excuse to revert any change more than once. This applies equally to bold editors and to reverters. If your reversion is met with another bold effort, then you should consider not reverting, but discussing."
IMO: A revert is distinct from a bold effort
WP:EW: "The term "revert" is defined as any edit (or administrative action) that reverses or undoes the actions of other editors..."
Conclusion: Similar to above - If I make a bold edit that still undoes some change another editor made, and there's no policy-based reason to revert the reversion, discussion must be taken to talk page.
^ Editor 2 in this scenario owns the change, and must back up their new opinion in discussion
"Wikipedia should reflect the truth" is a common misconception. Instead, Wikipedia collects information that is verifiable. WP:V is a core policy of the project (similarly, see WP:TRUTH).
You said "there is bias on Wikipedia" - allow me to invite you to edit here and help to neutralize bias (in accordance with WP:NPOV). But before you do so, please read up on the policies and guidelines used around here.
If that's too much to read in one sitting, just start with these: Edit carefully, be polite, and if you violate policy and are told as much, don't take it personally - just take it to heart and continue to edit better.