I've done Scouting in the same district as my Guiding and the Venn diagram of issues between both organisations is somewhat round. The key issues are: stability, recruitment and retention of leaders, parental expectations, behaviour of children, supporting needs of children, increased pressure on budgets, and top-down attitudes from HQ. While trans-inclusion is a very legitimate concern, more so in Guiding, but to a lesser extent in Scouting, in the majority of units it isn't a major practical issue.
I fell into Scouting because of leader avaliability while my sons were in the organisation. That included the Covid years when leader avaliability was impacted. Guiding means more to me because it is a single-sex space for me.
A legacy of the Covid years was breaking the chain of young members becoming young leaders and adult leaders. Hopefully a blip, but that natural progression was lost for a few years. My Guiding unit finally has young leaders after a prolonged gap. Hopefully in a few more years, this will translate to gaining more young adult leaders.
Camps were hit hard. The logistics from HQ meant that for a lengthy period, only small group camps for older sections met the criteria. When we were able to resume pack holidays, they were logistically harder due to "training" all participants because the natural chain of learning from older peers was broken. The lengthier legacy has been the loss of some organised camps that never resumed, and selling off assests of Guiding and Scouting residential/ camp venues. This has reduced value, logistically viable opportunities for leaders to organise camps.
Guiding Organiser is a (to put it mildly) fucking nightmare of an administrative system and the beauocratic UMA/ skills builders/ badges must be logged through it. The current programme and its tedious activity cards sold a mythical concept of activities being "good to go". The reality is that it saves zero time on planning and administration and if anything adds to it. We're an active unit and our best nights are the 40% that are off-piste, and we make sure that we have a spread of activities through each term. My sons lamented that they had to do Scouting as my Guiding was more fun.
There is a general societal issue of volunteering not being valued. A significant minority of parents/ participants can be very unrealistic in their expectations (and think that £4 per night is rent, activities and salary for 4 leaders...), yet the critical ones are inevitably the ones who are far too "busy" to volunteer or support. It's not unique to Guiding and is common through the voluntary sector.
Ultimately I've stuck it out for nearly 20 years for the friendship of my team and the fun of working with the girls. I see many of my ex-Brownies at work and they have many special memories of things that we did which is lovely to look back on and remind me how valuable those years and years of giving up an evening a week are no matter how tired I am and how hard it is to leave the house on grim winter nights.