ANSWER:

You must work on yourself and practice to recite faster in your voluntary prayers so that it would be easier for you in congregation. You must not think of quitting going to the masjid as these are whispers of Satan to make you abandon praying altogether. 

I have difficulty keeping up with the imams in Salah. The imams appear to recite at a normal pace, but I think I’m too slow. My problem is when I try to keep up by reciting faster, my focus in the prayer shifts away from the prayer itself. For this reason, I’ve been disliking the congregation prayer. Please advice me.