That is the failing of the system that the UK, along with other countries, have.

The next chance to vote on the ruling party is a couple of years, and is guarantee. The looser will leave power. That too is close to a guarantee.
The next chance to vote on the EU might well be whenever, if ever, the government allows it in whatever way they choose to do.

If the two issues were delinked - which almost any form of proportional representation would allow - that would be great.

What would also be great would to be less obtuse.