I think that if your regulator keeps failing you must have something wrong with the window guides. Either something is not well aligned, or the guides are rusted, need fresh grease or something is binding for some reason along the window travel. There can be a lot of dirt that gets packed tight inside the seals, you might want to remove all the window seals and clean them completely.
I had a rusted window guide on the front passenger door last year, the poor thing was totally gone, the motor was struggling to lift the window:
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