Actually, just spotted on Page 6
Panel 3, balloon 1: missing tail.
Panel 4, balloon 1: line break "everything, but || it's a start...">>90455403
Panel 4: "Set this stage on fire".
Panel 5, balloon 2: "We're gonna destroy this venue!"
Straight tails would suit the dialogue better; see below.
Most of the issues I can see with the lettering are with the positioning of the balloons, tails, and text within them.
The balloons are all perfect ovals, but the text within them often doesn't fit the shape well. Text should be centred, not left-aligned. Controlling where the line breaks go will help, but you also need to be aware of how each line will read.
If you make the balloons with 4 control points and adjust their positions and handles, you can customise the shapes to fit the text better, instead of trying to force a block of square text into a round balloon.
Make sure the text is centred properly within the balloon, so it isn't too close to one side or touching the edges. A customised balloon shape helps here, over a perfect oval.
Watch the positions of the balloons, so they aren't forming tangents with panel borders and elements within the panels.
Vertical positioning trumps horizontal, so a balloon in the top right will read before one in the bottom left.
Tails should point to people's faces.
A single straight tail has more energy/is more immediate than a curved one.
Ideally, they should emerge as if they were drawn with a straight line starting at the centre of the balloon. So, perpendicular to the balloon edge.
Again, watch the positioning for tangents.
Plan the lettering at the layout stage; don't try to force it to fit in whatever gaps you've left. That way it's not covering important art elements; you also don't need to draw anything in areas that will be covered by a balloon.
Don't skimp on or rush the lettering; be just as fastidious with it as with your artwork.