Electroplating copper yields rough surface?
There are few things that you can improve.

First, beads are forming because your copper anodes are not pure copper. Beads are forming around impurities. You can try to remove (filter) impurities by firmly wrapping anodes in paper tissue or better with water filtration polypropylene felt filter so only Cu ions can pass into solution. You can after that collect impurities already present in solution by electroplating few hours on some scrap piece of wire.

Second, holes should be drilled cleanly. You should invest into carbide drill bits and good drill stand.

Third, you should also think about adding Cl ions to solution, NaCl or HCl in small quantities. Plated surface will be shinier...

Best regards,
Pavle