i'm VERY lazy about such things. too much easing (that is ... squishing the extra to fit the less and vice versa) could create a lot of unattractive ripples and puckers. fixing your seams will take forever. for me, that's too much time, effort and stress. life is too short.
my solution would be to attach the strips to each other so that they are deliberately offset. by that, i mean i'd sew them together so that none of the seams from one strip intersect with any of the seams from the next strip. don't worry about how evenly spaced things are. just put them together any-old-whicha-way. there will probably be bits of strips hanging off the ends of each set. trim off the excess from each end. (whether you do that as you stitch each set or after the who top is assembled should depend on how handy you are with a ruler and how much workspace you have.)
when it's all together and trimmed, it will be smaller than intended. either settle for a smaller quilt, or add some border strips.
THEN i'd get some new fabs and use the lessons i learned from this attempt to make the quilt i wanted in the first place.
if you need the intended quilt right away, just put the wonky one aside for later and start over now.