I found that as a L7, initially enjoyed it, then it seemed like i'd got stuck in a bit of a rut. I was gaining more experience from doing games, but because the only feedback I was getting from the players it was difficult to know if I was good or bad. Also as a relatively new L7, you tend to get the lower division games, not the ones further up the local league structure. I live in the middle of 3 Football League Areas. The first was west of me, with one division of 8 teams, the second north of me with 2 divisions each of 8 teams, the third was south of me with over 70 teams across 8 divisions. Because i'd done my course North of where I lived, i'd naturally fallen into the North and West appointments so was getting the same teams week in week out.
I then decided to move leagues and concentrate on the league south of me, which gave me a wider selection of teams and the standard was better (top division of the league North was about equal to the 4th tier in the new league), this made a big difference to the types of games I was getting.
Things further picked up for me when I joined the supply league AR panel. Going out, being part of a "3" and watching how higher level referees operated, picking up experience of having assessors at games critiquing the performance of my AR technique, but also more importantly what the L4's were doing really helped to enthuse me to try those things out in my game. As I did, I could feel my game improving.
After half a season on the supply league line, I then started to think seriously about doing a 7-6 promotion, something i'd never considered in the 2 1/2 years i'd been refereeing. I applied and passed and this promotion season i'm doing my 6-5. For me this has increased my enjoyment so much, as there are more leagues available for me to be appointed to.
To give you an idea as an L7 (and not doing supply league lines), I would generally be appointed to one of my local leagues in one of 5 divisions as the top 3 divisions would normally be given to L5's or 6-5 promotion candidates.
Currently i've got the opportunity to do games middles on around 11 Divisions (8 at Local league, 3 at County league), plus lines on one of 2 Supply League Divisions. The level of diversity in locations, grounds, players and types of football has made it much more enjoyable, plus getting more challenging games on bigger pitches keeps things interesting.
3 Years ago, i'd have told you I was happy being a L7 referee and didn't have an aspiration to go for promotion, now, i'm well on way to completing 6-5 (2 good assessments in the bag) and will comfortably reach the required number of games and i'm seriously split between having a year at L5, or trying 5-4 in the next promotion season.
Sorry for the long response, my suggestion is that what you are feeling may be based on the repetitive nature of the leagues you are on and a bit more diversity might help to improve things.