Tuvix was an accident that if left alone would have ended two lives.
Tuvok has a wife and children that he wants to get home to but staying as is would have ended all he had. Neelix would have never joined the other Talaxians, saved them and found love and family.
I think Janeway made the right choice. Maybe it wasn’t directed with enough care but I always thought it was the correct choice.
It’s all good. Your opinion is totally valid and I also don’t wish to rehash the same debates that have been done over and over already.
Live long, prosper and may the Great Material Continuum carry you.