Take comfort in the fact that slow runners are faster than 99 percent of the adult population; the fact that you are doing it is the important thing, time matters only to you. I ran marathons for years and was usually sub-4 hours, whatever significance that has. I remember one loudmouth after at a race talking about 4 hour+ runners that he called “recreational runners” (about 85 percent of marathoners) and that he ran 3:40 as a “competitive runner”. I responded that while this is a great time, that marathons are won more in the low 2 hour range so that when the winner comes in, a 3:40 runner like him is about at Mile 16 or 10 miles in back of the finish line and would need the world’s best binoculars to see the truly competitive runners. That shut him up.
That is NOT competitive. (Not that I am; my only race, a 5-miler, I came in 120 out of 240 people.)
Actually, I think I was 121 out of 240.