Irregular Verbs pain

English native speakers have no problem with irregular verbs but for english learners it's a big pain!

Here are some of the confusing irregular verbs. Couldn't we just use 'ed' postfix for all verbs?

Infinitive	Simple Past	Past Participle
backslide	backslid	backslidden / backslid
bear	bore	born / borne
bleed	bled	bled
creep	crept	crept
grind	ground	ground
shrink	shrank / shrunk	shrunk
split	split	split
strike	struck	struck / stricken
weep	wept	wept