Quavo is sick of watching his favorite Atlanta Falcons squad underperform on Sundays ... so he's giving some advice to Dan Quinn -- bench Matt Ryan for Colin Kaepernick!!!
"We need to get Matt Ryan out of there!" the Migos rapper tells TMZ Sports.
Of course, Colin ain't on the Falcons' roster ... and it's unclear if Atlanta even sent a rep to watch his workout near the team's facility Saturday.
But Quavo tells us he doesn't care .