I don't know where you play but my parents lived in Florida for the first 25 years of their retirement. Dad played at least three times a week until he physically couldn't do it anymore. He felt somewhat like you in that he was contemplating giving up the game because he couldn't score the way he used to.
I went to visit him and played the course he belonged to. They had stopped calling any tees "Ladies" years prior because of the growing retired population at the course. Instead, they geared their tees toward handicap. Furthest back - scratch. Next set forward - 7 or less, etc. All tees were competitive for that level of golfer, male or female, young or old. Based on your abilities, you played the Black, White, Black & White, Blue & Orange, Black & Yellow.
Dad had been playing the White tees since he'd arrived there 15 years prior. He was devestated every time he turned in a score card over 100. There was an explanation of the tee boxes on the score card. I talked to the local pro to insure I understood the concept. A few days later we played another round. Being a 14, I moved up to the Black& White tees. Dad refused to do the same until I "stepped" on each of his first three tee shots.
The next time I visited, I played the Black & Whites and he played the Blue & Orange. We had a great, competitive round and had fun at the same time.
Play it forward, play for fun, play the game.