Lanier warbird ARF's
My experiences with Lanier products do not mirror yours. Kits and ARF's have all been top quality (most recent is Giant Stinger ARF...outstanding construction, covering, painting and hardware).
Previously, their customer service has been tops for correcting damaged parts too.
Every manufacturer can have a clunker ARF, either an individual kit or particular model. You should contact them with your specific issues. If you have done everything by the book, are an adequately experienced pilot for those models, they will want to know of the problems and have an opportunity to correct it with you.
If that has not been done then negative venting here is doing them, and you, a disservice.