So many people I know have said this and I always say he same thing. Watch an episode of a later series, then realise what a great show it is, a true classic of Sci fi storytelling, then grumpily go back to the start and watch the admittedly slow start. I always recommend the episode Horizon, series 2 episode 4 available on youtube.
Wonderful interaction from the regulars, a good easy to follow story and no spoilers to ruin future enjoyment.
Blake and crew of The Liberator have their sights on a distant out of the way planet on the edge of the galaxy that the Federation ( boo hiss) don't know about, and could be useful as a base. But they're in for a shock when they get there, the feds are already there subjugating the population. This episode is a subtle, or perhaps not too subtle dig at British Colonialism. Watch it enjoy it and the series is there for you. Of course the opposite is equally true, hate it and then be assured Blakes7 is not for you.