Maybe someone's mentioned this before but I see everybody always point out how Max tells El in s3 that Mike will come crawling back begging for her forgiveness, and he of course instead does that for Will. But in an earlier scene, she also mentions that El should ignore Mikes calls.
How many times does Mike call her after that moment to try and fix their failing relationship?
Yup, zero. Mike puts no effort into fixing Mileven in any of the ways that are stated by Max. Not only this, but the person who actually ignores Mikes calls after this (though inadvertently because of Joyce's job) is none other than Will. Looks like Mike is finally making an effort...
In conclusion, just another factor pointing to El deserving better and Byler endgame!