I'm as cheap as anyone... but we're talking about a $7 screwdriver... that WILL be useful in the future... since... the one you have... isn't cutting it... ¯\_(ツ)_/¯
A high quality small sized phillips screwdriver is one of the most important types of tools not to cheap out on, because it does tend to cam out (or gets chewed up) and cause damage if not precisely made and hardened, quality metal. Unless you have one foot in the grave so this is the last project you'll ever do, I'd just bite the bullet and get a set of the phillips like Wera or Wiha, for example at the lowest price point (AFAIK) to cover a good precision range:
You can still spend more and do better, and there is a reasonable argument to be made for buying the largest size-spanning set you can afford, but this set gets you sizes 000 through 1 in decent quality, then 2 and larger, the quality matters less (* for personal electronics/computer/etc work where torque is non-critical).