First of all, congrats on the birth of your daughter.
Now, down to business
Fire your damn trainer. I am serious. A trainer that has you doing the same thing over 2 years does not know anything about how to build a decent looking and strong physique.
In order to gain mass/strength, you need to change some variables in your training. The first thing that lifters should be focusing on is changing the load; specifically, adding workload (weight x reps x sets) to the bar on a consistent and progressive basis. Progressive overload is the tenet of strength training.
Regarding a leg program, just keep it simple. Squats, deadlifts, lunges, and a posterior chain assistance movement (pull-throughs, hypers, glute ham raises) are all you really need.