It sounds like a un-adjusted clutch or a weak clutch cover,,,,possibly the wrong release bearing. .When the clutch was replaced, did you replace all parts?
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us. - - Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!