Being new to Pin ownership, I don't know the answer to this... Were the solder joints horrible looking from the factory? Or does this mean a previous owner has done horrible soldering before I bought it? (1986 machine - PinBot)

UPDATED with pics.
The one with the green circle seems to be a nice joint.
The one with the red circle seems to be a messy joint and the yellow arrows showing where it looks like an amateur burnt the wire and one of the messy joints. But all joints on this switch are pretty messy.
The pic with no circle but a red arrow, this looks like a burn mark from the switch itself. I'm having trouble with this switch registering 100% of the time. So I'm wondering if the switch is bad or if the connections just suck.

PXL_20210224_191409037_3 (resized).jpgPXL_20210224_191409037_4 (resized).jpgPXL_20210224_191553239_2 (resized).jpg

UPDATED original post above with pics.
The one with the green circle seems to be a nice joint.
The one with the red circle seems to be a messy joint and the yellow arrows showing where it looks like an amateur burnt the wire and one of the messy joints. But all joints on this switch are pretty messy.
The pic with no circle but a red arrow, this looks like a burn mark from the switch itself. I'm having trouble with this switch registering 100% of the time. So I'm wondering if the switch is bad or if the connections just suck.

Thanks guys. And what about the red arrow pic with the gray "soot" on the switch? Could this indicate a bad switch? (Like I said, it seems this switch does not register, at least not 100% of the time).

Yeah. That's what I was thinking. But now I have to find a replacement and then figure out how to do soldering while it is on the playfield without getting solder on anything else.

Just an update... thanks to everyone that gave me advice. I ordered a new switch (and actually new coin mechs, too) and yesterday I completed my first machine repair that required soldering (and some desoldering). I replaced the defective drop target switch and the coin mechs (one of which needed it's switch wired). All of them are working great now! It is much better gameplay since the one drop target wasn't working properly, made it very hard to complete the tasks.