Another way that stitches are made too tight is by knitting on the needle tips. I used to do this until I got in the habit of laying the yarn lightly a little further back on the needle shaft. This also helps me to achieve suggested gauge. The only time I give the yarn a tug is when I'm purling which tends to be loose. The stitches come out looking more even.
Always a beginner...sometimes I even finish.
Every project is a new beginning.
While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease