I think your question was rhetorical, but it piqued my interest! So, looking back from the club's formation in 1906 and including recognised first-team fixtures only (so League (including play-offs), League Cups, The FA Cup, Football League Associate Members Cup, Football League Trophy, The FA Trophy and Anglo Italian Cup), I found out that 1968/69 is the only season in the club's history where we have exceeded 100 goals. That season we scored 78 league goals, 22 in The FA Cup and 6 in the League Cup for a total of 106 from 52 games.
The closest challenger is 1957/58, when we scored 90 goals in Division Three South and eight in five matches in The FA Cup for a total of 98 from 51 games. 1990/91 is third in the list with 67 Division Three goals, 2 in The FA Cup, 5 in the League Cup and 23 in the Associate Members Cup for a total of 97 in 56 matches.
In terms of League goals only, the 1950/51 Division Three South campaign ranks highest, with 92 in 46 matches ahead of the aforementioned 1957/58 with 90 and 1955/56 - our first season at the current Roots Hall - with 88 in 46 games.
In terms of goals per game, the top three campaigns are all from our previous spell in non-league football, with 2.70 in Southern League Division Two in 1911/12 and then - inspired by Harold Halse - 2.65 in 1907/08 and 2.64 in 1906/07. Each of those seasons featured fewer than 30 league games. 1968/69 is the only other season where we have netted more than two goals per game.
At the opposite end of the spectrum, it will come as little surprise that the 2020/21 League Two relegation campaign featured our fewest goals in a completed league season (29 in 46 games) and the lowest goals per game overall (0.67). We've only scored fewer than a goal per game in four seasons (1921/22 in Division Three South, 1996/97 in the second tier and 1948/49 in Division Three South in addition to 2020/21).
As for where our National League campaigns rank on goals per game, from 110 seasons (including those curtailed by war/pandemic), 2023/24 is 40th (1.5), 2024/25 is 48th (1.43), 2022/23 is 71st (1.24) and 2021/22 is 95th (1.08). The last two seasons have been above our overage average goals per game across our history of 1.41.