No, the earlier chapters hold value to you, not the newest ones. You're wasting your time, a finite resource, into reading something you aren't enjoying anymore (you told it: you'll rather rewatch the anime than reading any of the newer chapters). A very straightforward example of cost-sunk fallacy.
Being able to part ways from the manga doesn't make you any less of a fan and doesn't make the enjoyment you got from the earlier chapters a waste.
Just drop it. Hold the Watamote you liked dear inside your heart and instead use that time to read something else, something satisfying to you.